ML18011A497
| ML18011A497 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 07/12/1994 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML18011A496 | List: |
| References | |
| NUDOCS 9407150136 | |
| Download: ML18011A497 (4) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 2055&0001 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDME NO.
48 TO FACILIT OPERATING LICENSE NO. NPF-63 CAROLI POWER IG T COMP NY SHEARON HARRIS NUCL AR POWER PLANT U IT 1
DOCKET NO. 50-400
- 1. 0 INTRODUCTION By letter dated March 25, 1994, Carolina Power
& Light Company (CP&L or the licensee) submitted a request for changes to the Shearon Harris Nuclear Power Plant, Unit. 1 (SHNPP), Technical Specifications (TS).
The proposed amendment revises TS 3/4.8.4.2 by eliminating the term "motor starter" and replacing it with a more accurate description of the motor-operated valve (MOV) bypass configuration.
Section 3/4.8.4.2 of the TS provides operability and surveillance requirements for MOV thermal overload protection.
In this TS, the term "motor starter" was inappropriately used to describe the thermal overload protection function for safety-related MOVs.
The staff's evaluation of the licensee's proposed changes follows.
2.0 EVALU TIO In their March 25, 1994, letter, the licensee stated that the terminology used in TS 3/4.8.4.2 is not consistent with the MOV electrical supply configuration utilized at SHNPP and creates the potential for confusion related to the operability of the valve s bypass configuration during post-maintenance testing of the MOVs.
Specifically, the licensee proposes to revise TS 3/4.8.4.2 by (1) eliminating the term "integral with the motor starter,"
and (2) eliminating the term "motor starter" and replacing it with "thermal overload bypass relays and circuitry."
The licensee stated that the need for the proposed changes was revealed during resolution of a CP&L event report recently generated at SHNNP.
The licensee reviewed the applicable control wiring diagrams during their effort to resolve the event report and found that for each of the MOV supply safety-related
- busses, a separate motor control center cubicle (completed with associated control relays and circuitry) had been installed to bypass the MOV's thermal overload protection devices under certain plant operational conditions.
The control relays and its related circuitry are completely separate from the HOV motor starters.
Under the requirements of TS 3/4.8.4.2, these bypass relays and their circuitry must have their operability demonstrated because of their safety-related function.
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The staff reviewed Section 8.3'. 1.1.2.11, Electrical Circuit Protection
- Systems, in the-Final Safety Analysis Report (FSAR) and found that for all safety-related motor-operated valves its thermal overload devices were designed to be bypassed to prevent the HOV's control circuit from opening when an engineered safety feature actuation signal is pr esent.
This feature is designed to give sufficient time for the motor, if overloaded but not stalled, to complete its valve closure (or opening) cycle.
Based on this review, the staff finds that the licensee's proposed changes to be consistent with the
- FSAR, and considers the changes to TS 3/4.8.4.2 to be administrative in nature.
Therefore the proposed changes are acceptable.
- 3. 0 STATE CONSULTATION In accordance with the Commission's regulations, the State of North Carolina official was notified of the proposed issuance of the amendment.
The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
The amendment changes a requirement with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20 and changes the Surveillance Requirements.
The NRC 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 Commission has previously issued a
proposed finding that the amendment involves no significant hazards consideration, and there has been no public comment on such finding (59 FR 22002).
Accordingly, the 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 the amendment.
5.0 CONCLUS IO The Commission 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, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Cont} ibutor:
N.
Le ate July 12, 1994
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