ML20028D459
| ML20028D459 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 01/10/1983 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20028D456 | List: |
| References | |
| NUDOCS 8301190151 | |
| Download: ML20028D459 (3) | |
Text
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UNITED STATES
'g NUCLEAR REGULATORY COMMISSION g
,j WASHING TON, D. C. 20555
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION ~
RELATED TO AMENDMENT N0.16 TO FACILITY OPERATING LICENSE NO. DPR-75 PUBLIC SERVICE ELECTRIC AND GAS COMPANY PHILADELPHIA ELECTRIC COMPANY, DELMARVA POWER AND LIGHT COMPANY, AND l
ATLANTIC CITY ELECTRIC COMPANY SALEM NUCLEAR GENERATING STATION, UNIT NO. 2 DOCKET NO. 50-311 Introduction By letter dated November 22, 1982, Public Service Electric and Gas Company requested a modification to Technical Specification 3.7.3 to allow continued operation beyond the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> with one component cooling water heat exchanger out of service.
Discussion The No. 22 Component Cooling Water Heat Exchanger (CCHX) was rendered inoper-able at 0770 hours0.00891 days <br />0.214 hours <br />0.00127 weeks <br />2.92985e-4 months <br /> on November 20, 1982, due to a tube leak in the heat exchanger. The unit was operating in MODE 1 at approximately 70% of rated thermal power. Technical Specification 3.7.3 requires that No. 22 CCHX be returned to Operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or the unit be placed in hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
The CCHX tube leakage has been repaired; but the discovery of deteriorated internals in valve 228W127, a flow controller for No. 22 CCHX, has necessi-tated additional repair time. The valve internals have been repaired and the valve is being re-installed.
It appears, however, that final reassembly and testing may not be completed such that the heat exchangers can be declared operable within the allotted 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
PSE&G, therefore, has requested that Technical Specification 3.7.3 be amended on a one-time basis to permit operation for an additional 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> with the No. 22 CCHX rendered inoperable.
Specifically, the licensee has requested that a footnote be added to Technical Specification 3.7.3 to read 'as follows:
8301190151 830110 PDR ADOCK 05000311 P
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. "The time for completion of repairs to the No. 22 Component Cooling Water Heat Exchanger shall be extended from 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on November 23,1982 to 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on November 24, 1982. If repairs are not completed by that time, the unit shall be placed in HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />."
Evaluation The granting of this extension poses no undue risk to the health and safety of the public, since No. 21 CCHX has been determined to be operable in accordance with Technical 5gcification surveillance requirements and one exchanger is capable of removing the maximum heat removal load during normal full power operation or in hot standby mode.
Availability of only one Component Cooling Heat Exchanger affects the rate of plant cooldown, but does not affect the ability to cool down.
Further, greater than design heat removal capacity exists as actual Service Water inlet temperatures are approximately 54*F compared to design operational temperatures of 85'F.
In addition, the probability of needing the inoperable component cooling water heat exchanger during the 24-hour period is very small.
Based on our evaluation, we conclude that 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> will be sufficient to complete the necessary repairs.
Consequently, we approved an extension in time from 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on November 23 until 1900 hours0.022 days <br />0.528 hours <br />0.00314 weeks <br />7.2295e-4 months <br /> on November 23, 1982 to make the No. 22 Component Cooling Heat Exchanger operable or take the action required by T.S. 3.7.3.1.
Environmental Consideration We have determined that the amendment does 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 amendment involves an action which is insignificant l
from the standpoint of environmental impact and, pursuant to 10 CFR 551.5(d)(4),
that an environmental impact statement or negative declaration and environ-mental impact appraisal need not be prepared in connection with the issuance i
of this amendment.
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. Conclusion We have concluded, based on the considerations discussed above, that:
(1) because the amendment does not involve a significant increase in the probability or consequences of an accident previously evaluated, does not create the possi-bility of an accident of a type different from any evaluated previously, and does not involve a significant reduction in a margin of safety, the amendment does 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 conducted in compliance with the Commission's regulations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Date:
January 10, 1983 Principal Contributors:
Douglas V. Pickett Joseph D. Neighbors
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