ML19345H257
| ML19345H257 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 04/20/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19345H256 | List: |
| References | |
| NUDOCS 8105010438 | |
| Download: ML19345H257 (2) | |
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UNITED STATES y,#
g NUCLEAR REGULATORY COMMISSION 3 J'
... C WASHINGTON, D. C. 20555 o
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Q SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION AMENDMENT NO. 68 TO FACILITY OPERATING LICENSE NO. DPR-29, AND AMENDMENT NO. 62 TO FACILITY OPERATING LICENSE N0. DPR-30 COMMONWEALTH EDIS0N COMPANY AND IOWA-ILLIN0IS GAS XND ELECTRIC COMPANY QUAD CITIES NUCLEAR POWER STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-254 AND 255 Introduction By letter of March 29, 1979, Commonwealth Edison Company (licensee) proposed to eliminate a provision in the Appendix A Technical Specifications for Quad Cities Units 1 and 2 that requires continuous monitoring of the primary con-tainment inerting system makeup as a means for detecting gross containment leakage.
Discussion and Evaltiation The current TecFnical Specifications provide that, when the containment is inerted, it sh0Jld be Continuously monitored for gross leakage "by review of l
the inerting.ystem makeup requirements." Since this monitoring requirement was initiated, a pumpback system has been installed to maintain a minimum of 1.2 psi differential pressure between the drywell and the suppression chamber. This differential pressure is monitored continuously and provides a more sensitive and reliable method for indicating gross containment leakage than does monitoring of the inerting system makeup. Therefore, the requirement to continuously monitor the inerting system makeup is unnecessary, and the proposal to eliminate this requirement is acceptable.
Environmental Considerations
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l We have determined that the amendments do not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental impact. Having made this determination, we have further concluded that the amendments involve an action which is insigni-ficant from the standpoint of environmental impact and, pursuant to 10 CFR 551.5(d)(4), that an environmental impact statement, or negative declaration and environmental impact appraisal need not be prepared in connection with the issuance of these amendments.
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- Conclusion We have concluded, based on the considerations discussed above, that
(1) because the amendments do not involve a significant increase in the probability or consequences of accidents previously considered and do not i::volve a significant decrease in a safety margin, the amendments do not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3} such activities will be con-ducted in compliance with the Commission's regulations and the issuance of these amendments will not be inimical to the common defense and security or to the health and safety of the public.
Dated: April 20,1981 5
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