ML20129A718

Requests That Licensee Revise Renewal Application to Remove Authorization to Adjust DAC Based Upon Model Changes

ML20129A718
Person / Time
Site:	Framatome ANP Richland
Issue date:	09/11/1996
From:	Pierson R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:	Maas L SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER
References
NUDOCS 9609190037
Download: ML20129A718 (2)

Text

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September 11, 1996 Mr. L. J. Maas

• Ranager, Regulatory Compliance Siemens Power Corporation 5

P.Or Box-130 Richland, WA 99352-0130

SUBJECT:

SNM-1227 LICENSE SECTION 3.2.3

Dear Mr. Maas:

Section 3.2.3 of your present license and your renewal license states:

SPC may elect to adjust DAC based upon model changes recognized by national and international radiation protection experts. Examples of such model changes specifically include changes in weighting factors for various organs and in revisions in the ICRP lung model.

This authorization-to adjust derived air concentrations (DAC) based upon model changes was part of Amendment 26 of your license dated June 14, 1994. It was an oversight that approval was granted to Siemens Power Corporation to permit >

adjusting DAC based upon model changes.

Presently, we are not aware of any other NRC licensee who is authorized to adjust DAC based upon model changes by national and international radiation protection experts. All NRC licensees are required to use the DAC values in -

Table 1 of Appendix B of CFR Part 20 which are based upon ICRP-26 and ICRP-30.

Using models that are not based on this model could result in internal exposures that are different for the same intake.  ;

You are requested to revise the renewal application to remove the authorization to adjust DAC based upon model changes. This renewal' application revision should be submitted as soon as possible, as we are in the final process of completing the renewal of your license.

If you think NRC should allow licensees to use different models, we recommend that you file a petition for rulemaking in accordance with 10 CFR 2.802.

l If you have any questions, please contact me at 301-415-7190.

4 Sincerely, j Original signed by: MTokar for Robert Pierson, Chief 1

Licensing Branch

ivisi n f Fuel Cycle Safety 24003d and Safeguards, NMSS Docket License 70-1257 SNM-1227

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DISTRIBUTION:

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% September 11, 1996 Mr. L. J. Maas Manager, Regulatory Compliance Siemens Pow 6r Corporation P.O. Box 130 Richland, WA 99352-0130 i

SUBJECT:

SNM-1227 LICENSE SECTION 3.2.3

Dear Mr. Maas:

Section 3.2.3 of your present license and your renewal license states:

SPC may elect to adjust DAC based upon model changes recognized by national and international radiation protection experts. Examples of such model changes specifically include changes in weighting factors for various organs and in revisions in the ICRP lung model.

This authorization to adjust derived air concentrations (DAC) based upon model changes was part of Amendment 26 of your license dated June 14, 1994. It was an oversight that approval was granted to Siemens Power Corporation to permit adjusting DAC based upon model changes.

Presently, we are not aware of any other NRC licensee who is authorized to adjust DAC based upon model changes by national and international radiation protection experts. All NRC licensees are required to use the DAC values in Table 1 of Appendix B of CFR Part 20 which are based upon ICRP-26 and ICRP-30.

Using models that are not based on this model could result in internal  ;

exposures that are different for the same intake.

You are requested to revise the renewal application to remove the authorization to adjust DAC based upon model changes. This renewal application revision should be submitted as soon as possible, as we are in the

final process of completing the renewal of your license.

1 If you think NRC should allow licensees to use different models, we recommend that you file a petition for rulemaking in accordance with 10 CFR 2.802.

. If you have any questions, please contact me at 301-415-7190.

Sincerely,

?

Robert Pierson, Chie Licensing Branch Division of Fuel Cycle Safety and Safeguards, NMSS Docket 70-1257 License SNM-1227 l