ML20024H374
| ML20024H374 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 05/16/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20024H371 | List: |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 NUDOCS 9106030169 | |
| Download: ML20024H374 (2) | |
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ENCLOSURE SUPPLEMENTAL SAFETY EVALUATION REPORT BY THE OFFICE OF NUCLEAR REACTOR REGULATION CONFORMANCE TO REGULATORY GUIDE 1.97 DUKE POWER COMPANY CATAWBA NUCLEAR STATION, UNITS 1 AND 2 DOCKET N05. 50-413 AND 50-414
1.0 INTRODUCTION
By letter dated October 23, 1990, Duke Power Company submitted a request for a deviation from the recommendations of Regulatory Guide (R.G.) 1.97, Revision 2, relating to the reactor coolant system (RCS) soluble boron concentration instrumentation.
R.G. 1.97 recommends that Category 3 RCS soluble boron concentration instrumentation be provided to verify reactivity control. The licensee has proposed the use of the Post Accident Sampling System (PASS) to meet the R.G. 1.97 criteria for RCS soluble boron concentration monitoring, 2.0 EV ALUATION The licenst.e is currently using Category 3 RCS soluble boron concentration instrumentation to verify reactivity control. However, this instrumentation has relatively poor accuracy and requires frequent calibrations. The licensee stated that modif: cations and maintenance necessary on the existing instrumentation to provide more reliable information would not be cost psu unne P
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'. effective and proposed to use the PASS to monitor RCS soluble boron concentration. The licensee further stated that the PASS provides a direct measurement of boron concentration which meets and/or exceeds the R.G. 1.97 criteria.
In NUREG-0954, Supplement No. 3, "Saf ety Evaluation Report related to the operation of Catawba Nuclear Station, Units 1 and 2," the staff determined that the PASS met all the criteria of Item II.B.3 in NUREG-0737 and was Therefore, the acceptable for providing a post-accident sampling capability.
use of the PASS to monitor RCS soluble boron concentration is acceptable.
3.0 CONCLUSION
Based on the staf f's review of the licensee's submittals, we find that the use of the PASS to monitor RCS soluble boron concentration, at the Catawba Nuclear Station Units 1 ard 2, meets R.G. 1.97, Revision 2, and is therefore acceptable.
Principal Contributor:
B. Marcus 1
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