ML20072Q698
| ML20072Q698 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 09/06/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20072Q697 | List: |
| References | |
| NUDOCS 9409120172 | |
| Download: ML20072Q698 (2) | |
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UNITED STATES
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S NUCLEAR REGULATORY COMMISSION 5
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WASHINGTON, D.C. 20555 0001 l
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SAFETY EVALVATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO. 147 TO FACILITY OPERATING LICENSE NPF-9 AND AMENDMENT NO. 129 TO FACILITY OPERATING LICENSE NPF-17 DUKE POWER COMPANY MCGUIRE NUCLEAP STATION. UNITS 1 AND 2 DOCKET NOS. 50-369 AND 50-370
1.0 INTRODUCTION
By letter dated July 13, 1994, Duke Power Company (the licensee) submitted a request for changes to the McGuire Nuclear Station, Units 1 and 2, Technical Specifications (TS).
The requested changes would revise TS 4.6.2 by changing the testing interval for the air or smoke flow test through each containment spray from S to 10 years.
2.0 EVALVATION j
The piping in the containment spray system is fabricated from stainless steel.
The spray system is currently tested on a 5-year interval to confirm the absence of blockage that could potentially impact the required flow rates following a design basis accident.
The changes are consistent with NUREG-1366, " Improvements to Technical i
Specifications Surveillance Requirements," dated December 1992, that evaluated the testing of spray nozzles in pressurized water reactors' containment spray systems with stainless steel piping.
The conclusion drawn from this i
evaluation was that the corrosion of stainless steel piping is negligible during the extended surveillance interval. Therefore, since the spray systems are maintained dry and there are no other postulated mechanisms that would cause blockage, it was concluded that the surveillance interval could be increased from 5 to 10 years without any reduction in the plant safety.
Moreover, no obstruction of the nozzles has been observed to date during the tests conducted at the McGuire facility. The revised reduced testing of the spray system nozzles remains adequate to ensure operability of the nozzles.
On these bases, the staff finds the proposed change to be acceptable.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the North Carolina State official was notified of the proposed issuance of the amendments.
The State official had no comments.
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4.0 ENVIRONMENTAL CONSIDERATION
The amendments change surveillance requirements. The NRC staff has determined that the amendments involve no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite, and that there is no significant increase in individual or cumulative occupational radiation exposure. The Commission has previously issued a proposed finding that the amendments involve no significant hazards consideration, and there has been no public comment on such finding (59 FR 39583 dated August 3, 1994). Accordingly, the amendments meet the i
eligibility criteria for categorical exclusion ::et forth in 10 CFR j
51.22(c)(9). Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendments.
5.0 CONCLUSION
The Commission has concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendments will not be inimical to the common defense and security or to the health and safety cf the public.
Principal Contributor:
R. Martin Date: September 6, 1994 i
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