ML18058A329
| ML18058A329 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 04/01/1992 |
| From: | Slade G CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-75059, NUDOCS 9204070070 | |
| Download: ML18058A329 (2) | |
Text
consumers Power POW ERIN&
MICHl&AN'S PRO&RESS Palisades Nuclear Plant:
27780 Slue Star Memorial Highway, Covert, Ml 49043 April 1, 1992 Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT -
GB Slade General Manager TECHNICAL SPECIFICATIONS CHANGE REQUEST - INCORE ANALYSIS PROGRAM (TAC No. 75059) - ADDITIONAL INFORMATION After telephone discussion with the NRC Palisades Project Manager and review of notes taken at the September 23, 1990 meeting with the NRC staff, Consumers Power Company (CPC) confirms by this letter that, in general, the subject topic was discussed and CPC agrees to abide by the limitations and restrictions listed below if the use of the PIDAL incore analysis program is approved.
The purpose of this letter is to clearly state our understanding and interpretation of those limitations and restrictions and to commit to their application.
- 1.
CPC will limit the derivation of W-prime and pin-to-box factors and the generation of input to the PIDAL XTG nodal model to the use of Siemens Nuclear Power Corporation NRC approved methods.
- 2.
CPC will continue to replace all 43 rhodium detector strings each operating cycle and will notify the NRC if we change this practice.
- 3.
When using a quarter-core loading pattern (either reflective or rotational), CPC will, during initial startup and after achieving 50 percent power and before exceeding 85 percent power, confirm the model uncertainty is bounded by the proposed uncertainty values or will apply an additional 5 percent of those values as an uncertainty penalty.
- 4.
During the initial cycle of operation with quarter-core loading, CPC, at least every 31 days and before updating PIP alarm and calibration factors, will review, but not necessarily re-analyze, the PIDAL uncertainty components.
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- 5.
Before adding any additional operating cycle data to the PIDAL uncertainty analysis data base, CPC will ensure that data pooled by cycle and assumptions of the separability of the individual uncertainty components and the normality of the error distributions are verified using commonly accepted statistical techniques.
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Gerald B Slade General Manager CC Administrator, Region III, USNRC NRC Resident Inspector - Palisades