ML20138P526
| ML20138P526 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 10/29/1985 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20138P518 | List: |
| References | |
| NUDOCS 8511070217 | |
| Download: ML20138P526 (3) | |
Text
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UNITED STATES
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NUCLEAR REGULATORY COMMISdlON g
E WASHINGTON, D. C. 20555
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT N0. 95 TO FACILITY OPERATING LICENSE NO. DPR-59 POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333
1.0 INTRODUCTION
The reliability of emergency diesel generators (DG) is one of the main factors affecting the risk from station blackout. The improvement of DG reliability can therefore reduce the risk of core damage from station blackout events. The NRC staff has concluded that excessive testing results in degradation of diesel engines and the potential for reduced reliability. The staff is cor.cerned with the number of additional DG tests required for earlier-licensed operating plants, under their current technical specifications, compared with more recently licensed plants using the Standard Technical Specifications.
In an effort to reduce excessive testing of DGs in these older plants ar.d to make their technical specifications comparable with the Standard Technical Specifications in this regard, Generic Letter (GL) 84-15 (D. Eisenhut to All Licensees, dated July 2, 1984) recommended that the requirement for testing DGs when subsystems of the emergency core cooling system (ECCS) are declared inoperable, be deleted from plant unique technical specifications. Subsequently, the affected licensees were invited to submit revised technical specifications to reflect this change.
2.0 EVALUATION By letter dated April 26, 1985, PASNY submitted proposed revisions to the DG technical specifications (TS). The proposed TS and associated bases would eliminate the requirement for DG testing when subsystems of the ECCS are declared inoperable. The specific changes are as follows:
.3 Surveillance / Bases Page Inoperable ECCS Equipment 1.
4.5.A.2 114 one core spray system 2.
4.5.A.3(a) 114 one of the RHR pumps 3.
4.5.B.3(b) 115 LPCI mode 4.
4.5.B.3 116 one containment cooling subsystem 8
- glo7o217 85y1 a =cx os y
. We have reviewed the above revisions to the DG TS and associated bases and find the changes consistent with the intent of Generic Letter 84-15 to improve and maintain DG reliaoility by reducing excessive DG testing.
Therefore, we find the proposed technical specification changes acceptable.
To further reduce the number of DG starts, the licensee's letter dated April 26, 1985 also proposed to revise TS section 4.9.B.5 on page 217.
In the current FitzPatrick TS, the DG are required to be tested once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> when either one or both offsite power sources or when one of the DG is declare.d inoperable. The proposed revision would change the requirement for DG testing from once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> to once every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. We find this change consistant with the intent of Generic Letter 84-15 to improve and maintain DG reliability by reducing excessive DG testing. Therefore, we find the proposed change acceptable.
The licensee has also proposed changes that would delete the requirement that emergency diesel generators shall be operable from the Limiting Conditions for Operation (LCO) which are applicable when the following systems are declared inoperable:
Core Spray (CS); Low Pressure Coolant Injection (LPCI) mode of Residual Heat Removal (RHR); and Containment Cooling. This deletion has been proposed because operability requirements and the LC0 for the emergency diesel generators are already specified in s
Section 3.9.B of the TS under " Emergency A-C Power System."
In addition Section 3.0.E of the FitzPatrick TS states that reactor operation is governed by the time limits of the Action Statement of the LCO for the emergency power source; and, not by the Action Statement of the individual system that is determined to be inoperable due to the inoperability of its emergency power source. We have reviewed the proposed changes and find that they will eliminate redundancy and create consistency within the TS.
On this basis, we find the proposed changes acceptable.
3.0 ENVIRONMENTAL CONSIDERATION
S This amendment involves a change in the installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20.
The 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 occupational radiation exposure. The Comission has previously issued a proposed finding that this amendment involves no significant hazards consideration and there has been no public comment on such finding. Accordingly, this amendment meets 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 or environmental assessment need be prepared in connection with the issuance of this amendment.
4.0 CONCLUSION
We have concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that the health and safety of the public
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Principal Contributor:
- 0. Chopra Dated:
October 29, 1985 e
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