ML20235K223
| ML20235K223 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 07/07/1987 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20235K214 | List: |
| References | |
| NUDOCS 8707160211 | |
| Download: ML20235K223 (2) | |
Text
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lf - E WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT NO. 7 TO FACILITY OPERATING LICENSE NO. NPF-57 PUBLIC SERVICE ELECTRIC A GAS COMPANY ATLANTIC CITY ELECTRIC COMPANY HOPE CREEK GENERATING STATION DOCKET NO. 50-354
1.0 INTRODUCTION
By letter dated February 17, 1987, Public Service Electric & Gas Company (the licensee) requested an amendment to Facility Operating License No.
NPF-57 for the Hope Creek Generating Station.
The proposed amendment would revise Technical Specification Table 3.3.3-2 to change the descrip-tion of the 4.16 kv Emergency Bus Undervoltage Relay for degraded voltage protection from an inverte time delay voltage relay to a solid state relay.
In addition, an editorial change would be made to the footnote for the undervoltage trip setpoint and allowable value.
In response to staff questions, the licensee, by letter dated May 12, 1987, provided additional information in support of the February 17, 1987 request.
2.0 EVALUATION The licensee proposes that the inverse time delay relays be replaced by solid state relais because the relays currently used tend to exceed the permissible time of 20415, -5 seconds at 109.0 volts as specified in the Technical Specifications.
The licensee proposes improved equipment rather than changing the Technical Specification allowable values.
For the degraded voltage condition, the licensee proposes to use a combination of a solid state relay and an appropriate time delay relay (Agastat type) to meet the allowable values currently specified in the Technical Speci-fications. The modification will be qualified to Class IE standards.
The staff's review of the licensee's submittal shows that, based on their characteristic curves, the proposed solid state voltage relays provide a more predictable response within the required response time than the existing inverse time relays. Hope Creek is currently using similar relays in other applications in the emergency diesel generator power supply panels with acceptable performance results.
The manufacturer reconnends that the relay calibration should be checked once a year.
The Technical Specifications currently require that these relays be tested on a monthly basis during the channel functional test which is more conservative than the manufacturers reconnendation.
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. The change of the word " maximum" to " minimum" in TS Table 3.3.3-2 is an editorial correction..The existing footnote refers to an undervoltage-condition.
The trip setpoints and allowable values are.the minimum voltages that will not result in a trip.
If the voltage decreases beyond the specified value, an undervoltage trip is initiated.- The~ trip setpoint must be set higher than the specified values.
The staff review concluded that the proposed change would not relax the-Technical Specification requirements for degraded voltage protection.
.The equipment currently used to satisfy the technical requirements will be replaced with equipment that can meet the existing Technical Specifi-j cation performance requirements._ The equipment proposed to be used to 1
meet the Technical Specifications will be qualified to Class. IE Standards.
'l The existing surveillance requirement for the inverse time relays will be satisfactory for the solid state relays proposed by the licensee. The editorial change proposed will. improve the clarity.of the. Technical' Specifications. Based upon the above findings, the staff. concludes that the licensee's proposed change is acceptable.
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3.0 ENVIRONMENTAL CONSIDERATION
This amendment involves a change 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. The staff has determined that~the amendment involves no significant increase in the amounts, and no signi-ficant change in the types, of any effluents that may be released offsite and that thert 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
The Connission made a proposed determination that the amendment involves no significant hazards consideration which was published in the Federal' Register (52 FR 9583) on March 25, 1987 and consulted with the State of New Jersey.
No public comments were received and the State of New Jersey did not have any comments.
The staff 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, and (2).such activities will be conducted in compliance with the Comission's regulations and the issuance of this amendment will not be -
inimical to the comon defense and security nor to the health and safety-of the public.
Principal Contributors:
D. Florek and T. Koshy Dated: July 7, 1987 i
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