ML17156B329
| ML17156B329 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 08/16/1989 |
| From: | Thadani M Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17156B328 | List: |
| References | |
| NUDOCS 8909050504 | |
| Download: ML17156B329 (3) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO.
TO FACILITY OPERATING LICENSE NO.
NPF-14 AND AMENDMENT NO.
56 TO FACILITY OPERATING LICENSE NO. NPF-22 PENNSYLVANIA POWER 8( LIGHT COMPANY ALLEGHENY ELECTRIC COOPERATIVE INC.
DOCKET NOS.
50-387 AND 50-388 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1
AND 2
- 1. 0 INTRODUCTION By letter dated April 14, 1989, Pennsylvania Power 5 Light Company requested amendments to Facility Operating License Nos.
NPF-14 and NPF-22 for the Susquehanna Steam Electric Station, Units 1 and 2.
The proposed amendments would change the Technical Specifications to delete the Emergency Service Water (ESW) valves associated with diesel generators "A" through "E" from thermal overload protection requirements, add ESW motor operated valves HV-01112E and HV-01122E associated with diesel generator "E" to the thermal overload protection, and revise the load profile for channel "H" battery OD595.
2.0 EVALUATION As a result of evaluations in accordance with 10 CFR Part 50, Appendix R, the licensee has proposed to modify ESW system.
The modifications involve removing the auto-loop transfer for diesel generators "A" throu'gh "E", adding auto-closure to loop A ESW valves for diesel generator "E", and revision to the load profile for the diesel generator "E" 125 v dc battery.
The licensee states that as a
result of removal of auto-loop transfer function, the diesel generators "A"
through "E" ESW valves no longer have a safety related function other than maintaining the flowpath integrity or an isolation boundary when diesel generators are not aligned.
The licensee also states that thermal overload protectfon for these valves need neither be continuously bypassed nor does it have the capability of being bypassed.
Therefore, the licensee proposes to remove the thermal overload protection bypass for the affected valves.
The staff finds that the removal of the ESW valves associated with the diesel generators "A" through "E" from thermal overload protection requirements of Table 3.8.6.2.1-1 is acceptable, because the removal of auto-loop transfer function has rendered these valves to the safety related function of maintaining a flow path integrity only.
Additionally, the removal of the auto-loop transfer and addition of the auto-closure results in the only safety-related function of diesel generator "E"
loop A ESW valves'equirement to automatically Hose during loss of coolant accident (LOCA) and/or Loss of offsfte power (LOOP) conditions when diesel 8909050504 8908k b PDR ADQCK 05000387 P
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generator is not aligned but is being tested.
Therefore, the auto-closure and auto-bypass of the thermal overload protection must be added to Loop A ESW valves for the diesel generator "E".
The battery load profile of 125 v dc battery is reduced due to the removal of the auto-loop transfer logic eliminating the load associated with the final minute of the load profile.
The staff finds that the licensee's request is acceptable because addition of the requirement of diesel generator "E" loop A
ESW valves to automatically close during a
LOCA would require these valves to be added to thermal overload protection Table 3.8.4.2.2-1 for the motor operated valves.
Also the reduction in the load profile of 125 v dc battery is acceptable because it wi 11 continue to be bounded by the previously approved bounding load profile.
3.0 ENVIRONMENTAL CONSIDERATION
These amendments involve changes to a requirement with respect to the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes to the surveillance requirements.
The staff has determined that these 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 these amendments involve no significant hazards consideration and there has been no public comment on such finding.
Accordingly, these amendments meet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b) no environmental impact statement nor environmental assessment need be prepared in connection with the issuance of these amendments.
- 4. 0 CONCLUSION The Commission made a proposed determination that these amendments involve no significant hazards consideration which was published in the Federal Re ister (54 FR 21314) on May 17, 1989 and consulted with the State o~ennsylvan a.
No public comments were received, and the State of Pennsylvania did not have any coments.
The staff has concluded, based on the considerations discussed above, that:
(I) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed
- manner, and (2) such activities wi 11 be conducted in compliance with the Commission's regulations and the issuance of these amendments will not be inimical to the common defense and security nor to the health and safety of the public.
Principal Contributor:
Mohan Thadani August 16, 1989