ML20058E264
| ML20058E264 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 11/05/1993 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20058E244 | List: |
| References | |
| NUDOCS 9312060227 | |
| Download: ML20058E264 (3) | |
Text
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION Iys C
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c SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR RE RELATED TO AMENDMENT NO.
14310 FACILITY OPERATING LICENSE NO. DPR-36 i
MAINE YANKEE ATOMIC POWER COMPANY
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MAINE YANKEE ATOMIC POWER STATION DOCKET N0. 50-309
1.0 INTRODUCTION
By letter dated June 7, 1993, as supplemented October 1, 1993, the Maine Yankee Atomic Power Company (the licensee) submitted a request for changes to the Maine Yankee Atomic Power Station Technical Specifications (TSS).
j certain emergency core cooling system valves, the contain The i
containment isolation valves, and the emergency feedwater pumps.
make the specified surveillance frequencies consistent with the inserviceThe changes testing frequencies required by the ASME Boiler and Pressure Vessel Code (the Code),Section XI, and are consistent with staff recommendations in Generic Letter (GL) 93-05, "Line-Item Technical Specifications Improvements to Reduce surveillance Requirements for Testing During Power Operation."
93-05 modifies and endorses NUREG-1366, " Improvements to Technical-Generic Letter Specifications Surveillance Requirements."
The October 1, 1993 letter provided clarifying information that did not change the initial proposed no significant hazards consideration determination.
2.0 EVALUATION 1
Technical Specification 4.6.A.I.b The proposed revision to this specification changes the testing of automatically-operated valves in the safety injection and containment spray systems from monthly to quarterly to make the test frequency consistent with Maine Yankee's currently required edition of ASME Code,Section XI.
Though monthly valve exercising was originally required by Maine Yankee TS, quarterly valve exercising during power operation, where practical, is allowed for i
valves otherwise tested in accordance with the current ASME Code requirements for Maine Yankee.
The TS change will specify that valve testing be performed quarterly in accordance with TS 4.7, " Inservice Inspection and Testing of Safety Class Components."
safety, is consistent with 10 CFR 50.55a requirements, and is thereforeThe 1
acceptable.
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e Technical Specification 4.6.A.3 The revised specification changes the frequency of containment spray header surveillance testing from once every 5 years to once every 10 years, based on the recommendation found in NUREG-1366. Generic Letter 93-05 indicates that the NUREG-1366 recommendation is acceptable for plants with stainless steel piping in the containment spray system, but must be further justified if carbon steel piping is installed.
In its letter dated October 1,1993, Maine Yankee verified that the containment spray system piping in the Maine Yankee Atomic Power Station is 304 stainless steel.
The extension from once every 5 years to once evcry 10 years is consistent with the staff recommendations in GL 93-05 and NUREG-1366, and is therefore acceptable.
Technical Specifications 4.6. A.4 and 4.6. A.2.g The revised specifications divide the surveillance requirements for containment isolation valve (CIV) stroking into two parts, both of which reference the requirements of TS 4.7 for inservice testing. The specifications will require:
(1) that each CIV be stroked every 3 months to the position required to fulfill its safety function, where practicable, in accordance with the requirements for inservice testing, and (2) each automatic CIV that cannot be exercised every 3 months shall otherwise be tested in accordance with the inservice testing requirements.
The change ensures an adequite level of quality and safety, is consistent with 10 CFR 50.55a requirements, and is therefore acceptable.
Technical Specification 4.6.B The revised specification changes the surveillance test frequency of the emergency feedwater pumps from monthly to quarterly, as recommended in NUREG-1366 and GL 93-05.
The change also modifies the emergency feedwater system check valve surveillar.sa test frequency from monthly to quarterly.
The quarterly frequency for the pump testing and valve stroking is consistent with the inservice testing requirements of 10 CFR 50.55a. ensures an adeauate level of quality and safety, and is therefore acceptable.
Editorial Changes Minor editorial changes are made in TS 4.6.A and B.
These editorial changes add clarity and consistency to existing requirements.
Because there are no changes to technical content or requirements, these editorial changes are acceptable.
3.0 STATE CONSULTATI.QN In accordance with the Commission ~
egulations, the Maine State official was notified of the proposed issu, e the amendment. The State official had no comments.
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4.0 ENVIRONMENTAL CONSIDERATION
The amendment changes a requirement with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes surveillance requirements. The NRC staff has determined that the amendment involves 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 i
occupational radiation exposure. The Commission has previously issued a proposed finding that the amendment involves no significant hazards consideration, and there has been no public comment on such finding (58 FR 39053). Accordingly, the amendment meets the eligibility criteria for categorical exclusion set forth in-10 CFR 51.22(c)(9).
Pursuant to 10 CFR l
51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendment.
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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 i
activities will be conducted in compliance with the Commission's regulations, j
and (3) the issuance of the amendment will not be inimical to the common defense and security, or to the health and safety of the public.
Principal Contributors:
P. Campbell l
E. Trottier Date: November 5, 1993 3
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