[Federal Register Volume 71, Number 208 (Friday, October 27, 2006)]
[Notices]
[Pages 63046-63050]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-18066]


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NUCLEAR REGULATORY COMMISSION

[EA-06-250]


In the Matter of Holders of Material Licenses Authorized To 
Manufacture or Distribute Items Containing Radioactive Material of 
Concern; Order Imposing Fingerprinting and Criminal History Records 
Check Requirements for Unescorted Access to Certain Radioactive 
Material and Modification of the Additional Security Measures 
(Effective Immediately)

I

    The Licensees identified in Attachment 1 \1\ to this Order hold 
licenses issued in accordance with the Atomic Energy Act (AEA) of 1954, 
as amended, by the U.S. Nuclear Regulatory Commission (NRC or 
Commission) or Agreement States, authorizing them to manufacture or 
initially transfer items containing radioactive materials for sale or 
distribution. On August 8, 2005, the Energy Policy Act of 2005 (EPAct) 
was enacted. Section 652 of the EPAct amended Section 149 of the AEA to 
require fingerprinting and a Federal Bureau of Investigation (FBI) 
identification and criminal history records check of any person who is 
permitted unescorted access to radioactive materials subject to 
regulation by the Commission, and which the Commission determines to be 
of such significance to the public health and safety or the common 
defense and security as to warrant fingerprinting and background 
checks. NRC has decided to implement this requirement, in part, prior 
to the completion of the rulemaking to implement the provisions under 
the EPAct, which is underway, because a deliberate malevolent act by an 
individual with unescorted access to these radioactive materials has a 
potential to result in significant adverse impacts to the public health 
and safety or the common defense and security. Those exempted from 
fingerprinting requirements under 10 CFR 73.59 (71 FR 33,989 (June 13, 
2006)) for access to Safeguards Information \2\ (SGI) are also exempt 
from the fingerprinting requirements under this Order. In addition, 
individuals who have a favorably-decided U.S. Government criminal 
history record check within the last five (5) years, or individuals who 
have an active Federal security clearance (provided in each case that 
they make available the appropriate documentation), have satisfied the 
EPAct fingerprinting requirement and need not be fingerprinted again. 
Individuals who have been fingerprinted and granted access to SGI by 
the reviewing official under Order EA-06-155 do not need to be 
fingerprinted again.
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    \1\ Attachment 1 contains sensitive information and will not be 
released to the public.
    \2\ Safeguards Information is a form of sensitive, unclassified, 
security-related information that the Commission has the authority 
to designate and protect under section 147 of the AEA.
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II

    Subsequent to the terrorist events of September 11, 2001, the NRC 
issued a security Order requiring certain Manufacturing and 
Distribution (M&D) Licensees to implement Additional Security Measures 
(ASMs) for certain radioactive materials. The requirements imposed by 
that Order (M&D Order), and measures licensees have developed to comply 
with that Order, were designated by the NRC as Safeguards Information 
(SGI) and were not released to the public. One specific ASM, imposed by 
the M&D Order, required licensees to conduct local background checks to 
determine the trustworthiness and reliability of individuals needing 
unescorted access to radioactive materials. ``Access,'' to these 
radioactive materials means that an individual could exercise some 
physical control over the material or device. At that time, the NRC did 
not have the authority, except in the case of power reactor licensees, 
to require licensees to submit fingerprints for an FBI criminal history 
records checks of individuals being considered for unescorted access to 
radioactive materials subject to NRC regulations. Therefore, in 
accordance with Section 149 of the AEA, as amended by the EPAct, the 
Commission is imposing the FBI criminal history records check 
requirements, as set forth in this Order, including Attachment 2 to 
this Order, on all Licensees identified in Attachment 1 to this Order, 
who possess risk-significant radioactive materials equal to or greater 
than the quantities listed in Attachment 3 to this Order. These 
requirements will remain in effect until the Commission determines 
otherwise.
    This Order also modifies the M&D Order (EA-03-225 or EA-05-126M), 
to reflect recent Commission regulatory actions. The ASMs for M&D 
Licensees are modified to be consistent with (1) the ``Order Imposing 
Additional Security Measures on the Transportation of Radioactive 
Materials Quantities of Concern'' (EA-05-006), (2) the final rule on 
the Export and Import of Radioactive Material: Security Policies (70 FR 
37985 and 46066), dated July 1, 2005, (3) the Order Imposing Increased 
Controls (EA-05-090), and (4) the International Atomic Energy Agency 
(IAEA) Code of Conduct on the Safety and Security of Radioactive 
Sources.
    In addition, pursuant to 10 CFR 2.202, I find that in light of the 
common defense and security matters identified above, which warrant the 
issuance of this Order, the public health, safety, and interest require 
that this Order be effective immediately.

III

    Accordingly, pursuant to Sections 81, 149, 161b, 161i, 161o, 182, 
and 186 of the AEA of 1954, as amended, and the Commission's 
regulations in 10 CFR 2.202, 10 CFR Part 30, and 10 CFR Part 32, It is 
hereby ordered, effective immediately, that all licensees identified in 
Attachment 1 to this order

[[Page 63047]]

shall comply with the requirements set forth in this order.
    A. All licensees identified in Attachment 1 to this Order shall 
comply with the following requirements:
    1. The Licensee shall, within twenty (20) days of the date of this 
Order, establish and maintain a fingerprinting program that meets the 
requirements of Attachment 2 to this Order, for unescorted access to 
radioactive materials that equal or exceed the quantities listed in 
Attachment 3 to this Order.
    2. The Licensee shall, in writing, within twenty (20) days of the 
date of this Order, notify, the Commission, (1) receipt and 
confirmation that compliance with the Order will be achieved, or (2) if 
it is unable to comply with any of the requirements described in 
Attachment 2, or (3) if compliance with any of the requirements is 
unnecessary in its specific circumstances. The notification shall 
provide the Licensee's justification for seeking relief from or 
variation of any specific requirement.
    B. In accordance with the NRC's ``Order Imposing Fingerprinting and 
Criminal History Check Requirements for Access to Safeguards 
Information'' (EA-06-155), issued on August 21, 2006, only the NRC-
approved reviewing official shall review results from an FBI criminal 
history records check. The reviewing official shall determine whether 
an individual may have, or continue to have, unescorted access to 
radioactive materials that equal or exceed the quantities listed in 
Attachment 3 to this Order. Fingerprinting and the FBI identification 
and criminal history records check are not required for individuals 
that are exempted from fingerprinting requirements under 10 CFR 73.59 
[71 FR 33989 (June 13, 2006)] for access to SGI. In addition, 
individuals who have a favorably decided U.S. Government criminal 
history records check within the last five (5) years, or individuals 
who have an active Federal security clearance, (provided in each case 
that the appropriate documentation is made available to the Licensee's 
reviewing official) have satisfied the EPAct fingerprinting requirement 
and need not be fingerprinted again.
    C. Fingerprints shall be submitted and reviewed in accordance with 
the procedures described in Attachment 2 to this Order. Individuals who 
have been fingerprinted and granted access to SGI by the reviewing 
official under Order EA-06-155 do not need to be fingerprinted again.
    D. The Licensee may allow any individual who currently has 
unescorted access to radioactive materials, in accordance with the M&D 
Order, to continue to have unescorted access without being 
fingerprinted, pending a decision by the reviewing official (based on 
fingerprinting, an FBI criminal history records check, and a 
trustworthy and reliability determination) that the individual may 
continue to have unescorted access to radioactive materials that equal 
or exceed the quantities listed in Attachment 3 to this Order. The 
licensee shall complete implementation of the requirements of 
Attachment 2 to this Order by January 15, 2007.
    E. The ASMs of the M&D Order are modified as follows:
    1. ASM 7.d. is superseded in its entirety by Order EA-05-006.
    2. ASM 8. is superseded by 10 CFR Part 110--Export and Import of 
Nuclear Equipment and Material [see also Final Rule 10 CFR Part 110, 
dated July 1, 2005 (70 FR 37985 and 46066)--Export and Import of 
Radioactive Material: Security Policies].
    3. ``Table 1: Radionuclides of Concern'' is superseded by 
Attachment 3 to this Order.
    4. The requirement for a local criminal history check in ASM 5.a. 
is superceded by the FBI criminal history records check. All other 
requirements in ASM 5.a. are still applicable.
    Licensee responses to Condition A.2. shall be submitted to the 
Director, Office of Federal and State Materials and Environmental 
Management Programs, U.S. Nuclear Regulatory Commission, Washington, DC 
20555. In addition, Licensee responses shall be marked as ``Security-
Related Information--Withhold Under 10 CFR 2.390.''
    The Director, Office of Federal and State Materials and 
Environmental Management Programs, may, in writing, relax or rescind 
any of the above conditions upon demonstration of good cause by the 
Licensee.

IV

    In accordance with 10 CFR 2.202, the Licensee must, and any other 
person adversely affected by this Order may, submit an answer to this 
Order, and may request a hearing on this Order, within twenty (20) days 
of the date of this Order. Where good cause is shown, consideration 
will be given to extending the time to request a hearing. A request for 
extension of time in which to submit an answer or request a hearing 
must be made in writing to the Director, Office of Federal and State 
Materials and Environmental Management Programs, U.S. Nuclear 
Regulatory Commission, Washington, DC 20555, and include a statement of 
good cause for the extension. The answer may consent to this Order. 
Unless the answer consents to this Order, the answer shall, in writing 
and under oath or affirmation, specifically set forth the matters of 
fact and law on which the Licensee or other person adversely affected 
relies and the reasons as to why the Order should not have been issued. 
Any answer or request for a hearing shall be submitted to the 
Secretary, Office of the Secretary, U.S. Nuclear Regulatory Commission, 
ATTN: Rulemakings and Adjudications Staff, Washington, DC 20555. Copies 
also shall be sent to the Director, Office of Federal and State 
Materials and Environmental Management Programs, U.S. Nuclear 
Regulatory Commission, Washington, DC 20555, to the Assistant General 
Counsel for Materials Litigation and Enforcement at the same address, 
and to the Licensee if the answer or hearing request is by a person 
other than the Licensee. Because of possible delays in delivery of mail 
to United States Government offices, it is requested that answers and 
requests for hearing be transmitted to the Secretary of the Commission 
either by means of facsimile transmission to (301) 415-1101 or by e-
mail to [email protected] and also to the Office of the General 
Counsel either by means of facsimile transmission to (301) 415-3725 or 
by e-mail to [email protected]. If a person other than the Licensee 
requests a hearing, that person shall set forth with particularity the 
manner in which his/her interest is adversely affected by this Order 
and shall address the criteria set forth in 10 CFR 2.309.
    If a hearing is requested by the Licensee or a person whose 
interest is adversely affected, the Commission will issue an Order 
designating the time and place of any hearing. If a hearing is held, 
the issue to be considered at such hearing shall be whether this Order 
should be sustained.
    Pursuant to 10 CFR 2.202(c)(2)(i), the Licensee may, in addition to 
demanding a hearing, at the time the answer is filed or sooner, move 
the presiding officer to set aside the immediate effectiveness of the 
Order on the ground that the Order, including the need for immediate 
effectiveness, is not based on adequate evidence but on mere suspicion, 
unfounded allegations, or error. In the absence of any request for 
hearing, or written approval of an extension of time in which to 
request a hearing, the provisions as specified above in Section III 
shall be final twenty (20) days from the date of this Order without 
further Order or proceedings.

[[Page 63048]]

    If an extension of time for requesting a hearing has been approved, 
the provisions as specified above in Section III shall be final when 
the extension expires, if a hearing request has not been received. An 
answer or a request for hearing shall not stay the immediate 
effectiveness of this order.

    Dated this 17 day of October 2006.

    For the Nuclear Regulatory Commission.
Charles L. Miller,
Director, Office of Federal and State Materials and Environmental 
Management Programs.

Attachment 1--List of Applicable Materials Licensees (Redacted)

Attachment 2--Requirements for Fingerprinting and Criminal History 
Checks of Individuals When Licensee's Reviewing Official Is Determining 
Unescorted Access to Radioactive Material Subject to EA-06-250

General Requirements

    Licensees shall comply with the following requirements of this 
attachment.
    1. Each Licensee subject to the provisions of this attachment shall 
fingerprint each individual who is seeking or permitted unescorted 
access to risk significant radioactive materials equal to, or greater 
than, the quantities listed in Attachment 3 to EA-06-250. The Licensee 
shall review and use the information received from the Federal Bureau 
of Investigation (FBI) and ensure that the provisions contained in the 
subject Order and this attachment are satisfied.
    2. The Licensee shall notify each affected individual that the 
fingerprints will be used to secure a review of his/her criminal 
history record and inform the individual of the procedures for revising 
the record or including an explanation in the record, as specified in 
the ``Right to Correct and Complete Information'' section of this 
attachment.
    3. Fingerprints for unescorted access need not be taken if an 
employed individual (e.g., a Licensee employee, contractor, 
manufacturer, or supplier) is relieved from the fingerprinting 
requirement by 10 CFR 73.59 for access to Safeguards Information, has a 
favorably-decided U.S. Government criminal history check within the 
last five (5) years, or has an active Federal security clearance. 
Written confirmation from the Agency/employer which granted the Federal 
security clearance or reviewed the criminal history check must be 
provided for either of the latter two cases. The Licensee must retain 
this documentation for a period of three (3) years from the date the 
individual no longer requires unescorted access to radioactive 
materials associated with the Licensee's activities.
    4. All fingerprints obtained by the Licensee pursuant to this Order 
must be submitted to the Commission for transmission to the FBI.
    5. The Licensee shall review the information received from the FBI 
and consider it, in conjunction with the trustworthy and reliability 
requirements of the M&D Order, in making a determination whether to 
grant, or continue to allow, unescorted access to radioactive 
materials.
    6. The Licensee shall use any information obtained as part of a 
criminal history records check solely for the purpose of determining an 
individual's suitability for unescorted access to risk-significant 
radioactive materials equal to or greater thank the quantities used in 
Attachment 3 to EA-06-250.
    7. The Licensee shall document the basis for its determination 
whether to grant, or continue to allow, unescorted access to risk-
significant radioactive materials equal to or greater than the 
quantities used in Attachment 3 to EA-06-250.

Prohibitions

    A Licensee shall not base a final determination to deny an 
individual access to radioactive materials solely on the basis of 
information received from the FBI involving: An arrest more than one 
(1) year old for which there is no information of the disposition of 
the case, or an arrest that resulted in dismissal of the charge or an 
acquittal.
    A Licensee shall not use information received from a criminal 
history check obtained pursuant to this Order in a manner that would 
infringe upon the rights of any individual under the First Amendment to 
the Constitution of the United States, nor shall the Licensee use the 
information in any way which would discriminate among individuals on 
the basis of race, religion, national origin, sex, or age.

Procedures for Processing Fingerprint Checks

    For the purpose of complying with this Order, Licensees shall, 
using an appropriate method listed in 10 CFR 73.4, submit to the NRC's 
Division of Facilities and Security, Mail Stop T-6E46, one completed, 
legible standard fingerprint card (Form FD-258, ORIMDNRCOOOZ) or, where 
practicable, other fingerprint records for each individual seeking 
unescorted access to the risk-significant radioactive materials equal 
to or greater thank the quantities used in Attachment 3 to EA-06-250, 
to the Director of the Division of Facilities and Security, marked for 
the attention of the Division's Criminal History Check Section. Copies 
of these forms may be obtained by writing the Office of Information 
Services, U.S. Nuclear Regulatory Commission, Washington, DC 20555-
0001, by calling (301) 415-5877, or by e-mail to [email protected]. 
Practicable alternative formats are set forth in 10 CFR 73.4. The 
Licensee shall establish procedures to ensure that the quality of the 
fingerprints taken results in minimizing the rejection rate of 
fingerprint cards due to illegible or incomplete cards.
    The NRC will review submitted fingerprint cards for completeness. 
Any Form FD-258 fingerprint record containing omissions or evident 
errors will be returned to the Licensee for corrections. The fee for 
processing fingerprint checks includes one re-submission if the initial 
submission is returned by the FBI because the fingerprint impressions 
cannot be classified. The one free re-submission must have the FBI 
Transaction Control Number reflected on the re-submission. If 
additional submissions are necessary, they will be treated as initial 
submittals and will require a second payment of the processing fee.
    Fees for processing fingerprint checks are due upon application. 
Licensees shall submit payment with the application for processing 
fingerprints by corporate check, certified check, cashier's check, 
money order, or electronic payment, made payable to ``U.S. NRC.'' [For 
guidance on making electronic payments, contact the Facilities Security 
Branch, Division of Facilities and Security, at (301) 415-7404]. 
Combined payment for multiple applications is acceptable. The 
application fee (currently $27) is the sum of the user fee charged by 
the FBI for each fingerprint card or other fingerprint record submitted 
by the NRC on behalf of a Licensee, and an NRC processing fee, which 
covers administrative costs associated with NRC handling of Licensee 
fingerprint submissions. The Commission will directly notify Licensees 
who are subject to this regulation of any fee changes.
    The Commission will forward to the submitting Licensee all data 
received from the FBI as a result of the Licensee's application(s) for 
criminal history checks, including the FBI fingerprint record.

Right to Correct and Complete Information

    Prior to any final adverse determination, the Licensee shall make 
available to the individual the contents

[[Page 63049]]

of any criminal records obtained from the FBI for the purpose of 
assuring correct and complete information. Written confirmation by the 
individual of receipt of this notification must be maintained by the 
Licensee for a period of one (1) year from the date of the 
notification.
    If, after reviewing the record, an individual believes that it is 
incorrect or incomplete in any respect and wishes to change, correct, 
or update the alleged deficiency, or to explain any matter in the 
record, the individual may initiate challenge procedures. These 
procedures include either direct application by the individual 
challenging the record to the agency (i.e., law enforcement agency) 
that contributed the questioned information, or direct challenge as to 
the accuracy or completeness of any entry on the criminal history 
record to the Assistant Director, Federal Bureau of Investigation 
Identification Division, Washington, DC 20537-9700 (as set forth in 28 
CFR 16.30 through 16.34). In the latter case, the FBI forwards the 
challenge to the agency that submitted the data and requests that 
agency to verify or correct the challenged entry. Upon receipt of an 
official communication directly from the agency that contributed the 
original information, the FBI Identification Division makes any changes 
necessary in accordance with the information supplied by that agency. 
The Licensee must provide at least ten (10) days for an individual to 
initiate an action challenging the results of an FBI criminal history 
records check after the record is made available for his/her review. 
The Licensee may make a final determination on unescorted access to 
risk-significant radioactive materials equal to or greater than the 
quantities used in Attachment 3 to EA-06-250, based upon the criminal 
history record only upon receipt of the FBI's ultimate confirmation or 
correction of the record. Upon a final adverse determination on 
unescorted access to risk-significant radioactive materials equal to or 
greater than the quantities used in Attachment 3 to EA-06-250, the 
Licensee shall provide the individual its documented basis for denial. 
Unescorted access to risk-significant radioactive materials equal to or 
greater than the quantities used in Attachment 3 to EA-06-250, shall 
not be granted to an individual during the review process.

Protection of Information

    1. Each Licensee who obtains a criminal history record on an 
individual pursuant to this Order shall establish and maintain a system 
of files and procedures for protecting the record and the personal 
information from unauthorized disclosure.
    2. The Licensee may not disclose the record or personal information 
collected and maintained to persons other than the subject individual, 
his/her representative, or to those who have a need to access the 
information in performing assigned duties in the process of determining 
unescorted access to risk-significant radioactive materials equal to or 
greater than the quantities listed in Attachment 3 to EA-06-250. No 
individual authorized to have access to the information may re-
disseminate the information to any other individual who does not have a 
need-to-know.
    3. The personal information obtained on an individual from a 
criminal history record check may be transferred to another Licensee if 
the Licensee holding the criminal history record receives the 
individual's written request to re-disseminate the information 
contained in his/her file, and the gaining Licensee verifies 
information such as the individual's name, date of birth, social 
security number, sex, and other applicable physical characteristics for 
identification purposes.
    4. The Licensee shall make criminal history records, obtained under 
this section, available for examination by an authorized representative 
of the NRC to determine compliance with the regulations and laws.
    5. The licensee shall retain all fingerprint and criminal history 
records received from the FBI, or a copy if the individual's file has 
been transferred, for three (3) years after termination of employment 
or denial to unescorted access to risk-significant radioactive 
materials equal to or greater than the quantities listed in Attachment 
3 to EA-06-250. After the required three (3) year period, these 
documents shall be destroyed by a method that will prevent 
reconstruction of the information in whole or in part.

Attachment 3--Radionuclides of Concern

                   Table A.--Radionuclides of Concern
------------------------------------------------------------------------
                                                            Quantity of
           Radionuclide             Quantity of concern     concern \2\
                                         \1\ (TBq)             (Ci)
------------------------------------------------------------------------
Am-241...........................  0.6..................              16
Am-241/Be........................  0.6..................              16
Cf-252...........................  0.2..................             5.4
Cm-244...........................  0.5..................              14
Co-60............................  0.3..................             8.1
Cs-137...........................  1....................              27
Gd-153...........................  10...................             270
Ir-192...........................  0.8..................              22
Pm-147...........................  400..................          11,000
Pu-238...........................  0.6..................              16
Pu-239/Be........................  0.6..................              16
Ra-226 \3\.......................  0.4..................              11
Se-75............................  2....................              54
Sr-90 (Y-90).....................  10...................             270
Tm-170...........................  200..................           5,400
Yb-169...........................  3....................              81
Combinations of radioactive        See Footnote Below
 materials listed above \4\.        \5\.
------------------------------------------------------------------------
\1\ The aggregate activity of multiple, collocated sources of the same
  radionuclide should be included when the total activity equals or
  exceeds the quantity of concern.
\2\ The primary values used for compliance with this Order are TBq. The
  curie (Ci) values are rounded to two significant figures for
  informational purposes only.

[[Page 63050]]

 
\3\ The Atomic Energy Act, as amended by the Energy Policy Act of 2005,
  authorizes NRC to regulate Ra-226 and NRC is in the process of
  amending its regulations for discrete sources of Ra-226.
\4\ Radioactive materials are to be considered aggregated or collocated
  if breaching a common physical security barrier (e.g., a locked door
  at the entrance to a storage room) would allow access to the
  radioactive material or devices containing the radioactive material.
\5\ If several radionuclides are aggregated, the sum of the ratios of
  the activity of each source, I of radionuclide, n, A(i,n), to the
  quantity of concern for radionuclide n, Q(n), listed for that
  radionuclide equals or exceeds one. [(aggregated source activity for
  radionuclide A) / (quantity of concern for radionuclide A)] +
  [(aggregated source activity for radionuclide B) / (quantity of
  concern for radionuclide B)] + etc. * * * >=1.

Guidance for Aggregation of Sources

    NRC supports the use of the International Atomic Energy 
Association's (IAEA) source categorization methodology as defined in 
IAEA Safety Standards Series No. RS-G-1.9, ``Categorization of 
Radioactive Sources,'' (2005) (see http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf) and as endorsed by the 
agency's Code of Conduct for the Safety and Security of Radioactive 
Sources, January 2004 (see http://www-pub.iaea.org/MTCD/publications/PDF/Code-2004_web.pdf). The Code defines a 
three-tiered source categorization scheme. Category 1 corresponds to 
the largest source strength (equal to or greater than 100 times the 
quantity of concern values listed in Table 1.) and Category 3, the 
smallest (equal or exceeding one-tenth the quantity of concern values 
listed in Table 1.). Additional security measures apply to sources that 
are equal to or greater than the quantity of concern values listed in 
Table 1, plus aggregations of smaller sources that are equal to or 
greater than the quantities in Table 1. Aggregation only applies to 
sources that are collocated.
    Licensees who possess individual sources in total quantities that 
equal or exceed the Table 1 quantities are required to implement 
additional security measures. Where there are many small (less than the 
quantity of concern values) collocated sources whose total aggregate 
activity equals or exceeds the Table 1 values, licensees are to 
implement additional security measures.
    Some source handling or storage activities may cover several 
buildings, or several locations within specific buildings. The question 
then becomes, ``When are sources considered collocated for purposes of 
aggregation?'' For purposes of the additional controls, sources are 
considered collocated if breaching a single barrier (e.g., a locked 
door at the entrance to a storage room) would allow access to the 
sources. Sources behind an outer barrier should be aggregated 
separately from those behind an inner barrier (e.g., a locked source 
safe inside the locked storage room). However, if both barriers are 
simultaneously open, then all sources within these two barriers are 
considered to be collocated. This logic should be continued for other 
barriers within or behind the inner barrier.
    The following example illustrates the point: A lockable room has 
sources stored in it. Inside the lockable room, there are two shielded 
safes with additional sources in them. Inventories are as follows:

    The room has the following sources outside the safes: Cf-252, 
0.12 TBq (3.2 Ci); Co-60, 0.18 TBq (4.9 Ci), and Pu-238, 0.3 TBq 
(8.1 Ci). Application of the unity rule yields: (0.12 / 0.2) + (0.18 
/ 0.3) + (0.3 / 0.6) = 0.6 + 0.6 + 0.5 = 1.7. Therefore, the sources 
would require additional security measures.
    Shielded safe 1 has a 1.9 TBq (51 Ci) Cs-137 source and 
a 0.8 TBq (22 Ci) Am-241 source. In this case, the sources would 
require additional security measures, regardless of location, 
because they each exceed the quantities in Table 1.
    Shielded safe 2 has two Ir-192 sources, each having an 
activity of 0.3 TBq (8.1 Ci). In this case, the sources would not 
require additional security measures while locked in the safe. The 
combined activity does not exceed the threshold quantity 0.8 TBq (22 
Ci).

    Because certain barriers may cease to exist during source handling 
operations (e.g., a storage location may be unlocked during periods of 
active source usage), licensees should, to the extent practicable, 
consider two modes of source usage--``operations'' (active source 
usage) and ``shutdown'' (source storage mode). Whichever mode results 
in the greatest inventory (considering barrier status) would require 
additional security measures for each location.
    Use the following method to determine which sources of radioactive 
material require implementation of the Additional Security Measures 
(ASMs):
     Include any single source equal to or greater than the 
quantity of concern in Table A.
     Include multiple collocated sources of the same 
radionuclide when the combined quantity equals or exceeds the quantity 
of concern.
     For combinations of radionuclides, include multiple 
collocated sources of different radionuclides when the aggregate 
quantities satisfy the following unity rule: [(amount of radionuclide 
A) / (quantity of concern of radionuclide A)] + [(amount of 
radionuclide B) / (quantity of concern of radionuclide B)] + etc. . . . 
[gteqt]1.
 [FR Doc. E6-18066 Filed 10-26-06; 8:45 am]
BILLING CODE 7590-01-P