ML19262B583
| ML19262B583 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, Callaway, Sterling  |
| Issue date: | 12/14/1979 |
| From: | Petrick N STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| SLNRC-79-22, NUDOCS 7912280593 | |
| Download: ML19262B583 (2) | |
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SNUPPS Standardized Nuclear Unit Power Ptent System 5 Choke Cherry Road Rockville, Marytend 20050 (301) 86M010 December 14, 1979 SLNRC 79-22 File: 0491.10.2 SUBJ: Rod Drop Analysis Mr. Boyce Grier Director, Region I Office of Inspection and Enforcement U.S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406 Docket Nos: STN 50-482, STN 50-483, STN 50-485, STN 50-486 Ref:
- 1. SNUPPS letter to NRC Region I, SLNRC 79-5, dated April 26, 1979, Rod Drop Safety Analysis
- 2. Westinghouse letter (T.M. Anderson), NS-TMA-2167, to USNRC (A.
Schwencer),datedNovember 15, 1979, same subject.
Dear Mr. Grier:
On November 16, 1979, SNUPPS informed the Nuclear Regulatory Commission, Region I Office of Inspection and Enforcement, of a potential deficiency involving the dropped rod safety analysis. The information was communicated by telephone to Mr. Bateman of your staff pursuant to 10 CFR 50.55(e).
Reference 1 withdrew an initial notification of a reportable deficiency con-cerning the dropped rod analysis on the basis of Westinghouse studies for four loop plants. Reference 1 also indicated that the matter would be further examined. As a result of that ongoing review, Westinghouse determined that the original concern may, in fact, involve four loop plants such as SNUPPS.
Reference 2 described the specific concerns with the single and multiple rod drop analyses.
SNUPPS will continue to pursue the resolution of this matter and will address it in a revision to the SNUPPS FSAR. A permanent resolution of the concern is expected by mid - 1980. However, should a pennanent fix not be approved prior to start-up of the first SNUPPS plant, procedural changes can be adopted as an interim solution.
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SLNRC 79-22 File: 0491.10.2 Page 2 As further information is available on this matter, SNUPPS will inform ths NRC.
Ver truly yours,
<-h--< \\ C Nicholas A. Petrick RLS/yt cc:
Mr. James G. Keppler, Director, Region III, USNRC Mr. Karl V. Seyfrit, Director, Reaion IV, USNRC Mr. Victor Stello, Jr., Director, Office of Inspection./
and Enforcement, USNRC, Washington, D.C.
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