ML20027E294
| ML20027E294 | |
| Person / Time | |
|---|---|
| Issue date: | 10/31/1982 |
| From: | NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | |
| Shared Package | |
| ML20027E290 | List: |
| References | |
| TASK-RE, TASK-SG-045-4, TASK-SG-45-4 REGGD-05.023, REGGD-5.023, NUDOCS 8211120531 | |
| Download: ML20027E294 (3) | |
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than that of f240(effective), so the relative error in MPu(total) is 3
essentially equal to that of M240(effective).
As an example calculation, the sample of isotopic composition given in Table A-3 has an effective fraction given by:
f240(effective) = 2.50(0.003) + 0.185 + 1.70(0.011)
= 0.211 Thus, a holdup measurement of 35 i 10 grams Pu-240 effective corresponds to l
166 i 47 grams total plutonium, where the relative error in the total plutonium result was taken to be equal to that of the M240(effective) result.
O 8211120531 821031 PDR REGQD 41 05.023 R PDR
l DRAFT VALUE/ IMPACT STATEMENT 1.
PROPOSED ACTION 1.1 Description Licensees authorized to possess at any time more than 1 kilogram of plutonium are required by Part 70, " Domestic Licensing of Special Nuclear Material," of Title 10 of the Code of Federal Regulations to calculate a mate-rial balance based on a measured physical inventory at intervals not to exceed 2 months.
Further, these licensees are required to conduct their nuclear material physical inventories in compliance with specific requirements set forth in Part 70.
Inventory procedures acceptable to the NRC staff are detailed in Regulatory Guide 5.13, " Conduct of Nuclear Material Physical Inventories."
Plutonium residual holdup is defined as the plutonium inventory component remaining in and about process equipment and handling areas after those collec-tion areas have been prepared for inventory.
This regulatory guide describes procedures acceptable to the NRC staff for the in situ assay of the residual plutonium holdup.
1.2 Need for Proposed Action Regulatory Guide 5.23 was published in 1974.
The proposed actiot, a pro-posed revision to this guide, is needed to bring the guide up to date with respect to advances in measurement methods, as well as changes in terminology.
- 1. 3 Value/ Impact of Proposed Action 1.3.1 NRC Operations The regulatory positions will be brought up to date.
1.3.2 Other Government Agencies Not applicable.
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1.3.3 Industry Since industry is already applying the methods and procedures discussed in the guide, updating these methods and procedures should have no adverse impact.
1.3.4 Public No adverse impact on the public can be foreseen.
1.4 Decision on Proposed Action 1
The regulatory guide should be revised to reflect the improvement in measure-ment techniques and to bring the language of the guide into conformity with current usage.
2.
TECHNICAL APPROACH Not applicable.
3.
PROCEDURAL APPROACH 3.1 Procedural Alternatives Potential RES procedures that may be used for the proposed action include the following:
Regulation Revision of regulatory guide ANSI standard, endorsed by regulatory guide Branch position NUREG report 3.2 Value/ Impact of Procedural Alternatives Since a usable and useful regulatory guide already exists and modifications are minimal, the procedure having the least impact is to revise the guide.
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3.3 Decision on Procedural Approach A revised regulatory guide should be prepared.
4.
STATUTORY CONSIDERATIONS 4.1 NRC Authority The authority for the proposed action would be derived from the Atomic Energy Act of 1954, as amended, and is implemented through the Commission's regulations, in particular, 10 CFR Part 70.
4.P Need for NEPA Assessment The proposed action is not a major action that may significantly affect the quality of the human environment and does not require an environmental impact statement..
e 5.
RELATIONSHIP TO OTHER EXISTING OR PROPOSED REGULATIONS OR POLICIES The proposed action is one of a series of revisions of existing regulatory guides on nondestructive assay techniques.
l 6.
SUMMARY
AND CONCLUSIONS j
Regulatory Guide 5.23 should be updated.
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