ML20134L192
| ML20134L192 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 08/27/1985 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Richard J MISSISSIPPI POWER & LIGHT CO. |
| References | |
| TAC-56733, NUDOCS 8509030112 | |
| Download: ML20134L192 (1) | |
Text
August 27 1985 0
Docket No. 50-416
_ DISTRIBUTION:
7 Docket File: - 3 "NRC~PDR local PDR Mr. Jackson B. Richard PRC System Senior Vice President, Nuclear NSIC Mississippi Power & Light Company 1814-r/f -
P.O. Box 23054 MDuncan Jackson, MS 39205 LKintner OELD, Attorney BGrimes
Dear Mr. Richard:
ACRS (16)
EJordan JPartlow
Subject:
Grand Gulf Nuclear Station, Unit 1 Surveillance Testing of Fuses Used As Overcurrent Protection Devices For Containment Penetrations By letter dated January 5,1985, Mississippi Power & Light Company (MPal) provided its position on surveillance testing of fuses which are used as overcurrent protection for containment electrical penetrations. The BWR Standard Technical Specifications (STS) NUREG 0123 Rev. 3, include a surveillance requirement to periodically measure fuse resistance as a means of determining its capability to clear a fault in the electrical circuit.
In its January 5 letter, MP&t. questioned the need for this testing and provided additional information regarding its position that such fuses not be tested.
The NRC staff has reevaluated the requirement in the BWR STS and concluded that testing of fuses used for overcurrent protection of containment electrical penetration should not be required and that it should be deleted from the STS.
The bases for this conclusion are that operational experience indicates.
l the protection capability of current limiting fuses does not decrease with service life, such tests are not meaningful, and additional handling may compromise fuse integrity.
Accordingly, the staff accepts MP&L's position that surveillance testing of fuses used for overcurrent protection of containment electrical penetrations will not be performed in Grand Gulf Unit 1.
However, MP&L should include in appropriate plant procedures a means for periodically verifying that correct fuse sizes are installed.
Sincerely, Thomas M. Novak, Assistant Director for licensing Division of licensing cc: See next page 8509030112 850827 DESIG' n IJ 03I IN,tt, PDR ADOCK 05000416 Certified By J']
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