ML20247L198
| ML20247L198 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 03/27/1989 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20247L179 | List: |
| References | |
| NUDOCS 8904050405 | |
| Download: ML20247L198 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION.
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%.....);E WASHINGTON, D. C. 20686 g
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO. 54 TO FACILITY OPERATING LICENSE NO. NPF-38 LOUISIANA POWER AND LIGHT COMPANY WATERFORD STEAM ELECTRIC STATION. UNIT 3 DOCKET NO. 50-382
1.0 INTRODUCTION
Information Notice 86-71 identified burning of internal wires located in the operator limit switch compartment of motor-cperated-valves. These wires were located near or in contact with the installed limit switch compartment electric heater element or heater bracket. Ebasco's specifica-tions require heaters in both the motor and limit / torque switch and terminal block compartments. The heaters are useful during long term storage of the equipment during construction of the plant or when exposed to uncontrolled environments after installation or during long periods of shutdown. By letter dated December 6,1988 Louisiana Power and Light Company requested a revision to Technical Specification Table 3.8-1 to delete the surveillance requirements for motor operated valve actuator compartment heater circuit breakers.
2.0 EVALUATION i
Louisiana Power and Light Company has proposed changes to Technical Specifications Table 3.8-1 to delete the surveillance requirements for space heaters located in the actuator compartment of four safety injection tank isolation valves; SI-331A, SI-3318, SI-332A, and SI-3328. The motor operated valve actuators used for Class 1E applications are environmentally qualified. The licensee states that the motor space heaters are not seismically qualified as they are not considered essential for the actuators safety function. The motor heaters might fail in the short circuit mode, possibly resulting in the deenergizing of the control circuit. The licensee's December 6, 1988 letter indicated that power was disconnected l
at the space heaters locally leaving the wires energized. The staff raised a concern centered on a live-circuit coursing through the e'lectrical l
containment penetration and, thereby, compromising its integrity through failure of the live circuits.
In a letter dated January 5,1989, the licensee provided the clarification that the disconnect was actually at the power source negating our concerns with regard to live-circuit failures.
Accordingly, the licensee has proposed changes to Technical Specifications to delete motor operated valve actuator compartment heater circuit breakers from Table 3.8-1.
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,. We have reviewed the licensee's submittal and have found that Limitorque j
motor operators come with internal compartment heaters to maintain operator reliability during.long storage times and infrequent maintenance while in storage. The heaters play no functional role.in Limitorque actuator 3
operation. The change of disconnecting the actuator heater circuits at the distribution panel and of deleting the surveillance requirements for
- actuator compartment hsaters circuit breakers from Table 3.8-1 has no safety significance and is, therefore, acceptable.
The Ifeensee's letter dated January 5,1989 provided a clarification of the point at which power was removed from the circuits.
It does not represent a change from the proposed license amendment or no significant hazerds consideration as' noticed in the Federal Register on Jaruary 11, 1989. The clarification does remove a concern on circuit failur;es and is a positive safety enhancement for valve operation.
3.0
SUMMARY
We have reviewed the licensee's submittal and have concluded that the proposed circuit discernections and the change in Technical Specification Table 3.8-1 to delete the surveillance requirements for actuator compartment heaters have no safety significance in the performance of the actuator and is, therefore, acceptable.
4.0 CONTACT WITH STATE OFFICIAL N
The NRC staff has advised the Administrator, Nuclear Energy Division, Office of Environmental Affairs, State of Louisiana of the proposed determination of no significant hazards consideration. No comments were received.
5.0 ENVIRONMENTAL C0 ZIOERATION The amendment relates to changes in installation or use of a facility con.penent located w! thin 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, the amendment meets the eli criterieforcategoricalexclusionsetforthin10CFR51.22(c)(9)gibility Pursuantto10CFR51.22(b),noenvironmentalimpactstatementorenviron-mental assessment need be prepared in connection with the issuance of this amendment.
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6.0 CONCLUSION
Based upon its evaluation of the proposed changes to the Waterford 3 '
Technical Specifications, the staff has concluded that:
there is reason-able assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and such activities will be conducted in compliance with the Commission's regulations and the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public. The staff, therefore, concludes that the proposed changes are ac.ceptable, and are hereby incorporated into the Waterford 3 Technical Specifications.
Dated: March 27, 1989 Principal Contributor:
N. Trehan e
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