ML20206D998
| ML20206D998 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/27/1987 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8704130484 | |
| Download: ML20206D998 (2) | |
Text
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e -- k DUKE POWER GOMPAhT P.O. BOX 33189 CHARLOTTE, N.C. 28242 HAL B. TUCKER us.rpuon (704) 373-4331 March 27, 1987 U. S. Nuclear Regulatory Connaission Attention: Document Control Desk Washington, D. C. 20555
Subject:
Catawba Nuclear Station, Unit 1 Docket No. 50-413 Gentlemen:
Pursuant to Technical Specification 3.3.3.6, please find attached a Special Report concerning the operability of Post-LOCA High Range Radiation Monitors EMF-53 A and B.
Very truly yours, g/
/ 4 // / /
W Hal B. Tucker JGT/14/sbn Attachment xc:
Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Conunission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Mr. P. K. Van Doorn NRC Resident Inspector Catawba Nuclear Station 8704130484 870327 g
PDR ADOCK 05000413 S
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SPECIAL REPORT POST-LOCA HIGH RANGE RADIATION MONITORS EMF-53 A AND B INOPERABLE Sorrento Electronics, manufacturer of the Post-LOCA u Range Radiation Monitor, recently discovered the coaxial cable dielectric did noc maintain an acceptable resistance value at 350 degrees F.
After receipt of the Sorrento letter on March 12, 1987, the Containment Post-LOCA High Range Radiation monitors were made inoperable, although these monitors were operating normally. Duke Power Design Engineering will receive a follow up letter from Sorrento Electronics containing an evaluation work sheet. Completion of this work sheet should qualify the coaxial cable for the Catawba LOCA design base temperature of 240 degrees F.
Catawba is presently using other radiation monitors as an alternate method to satisfy Technical Specification 3.3.3.6, Accident Monitoring Instrumentation.
The i
radiation monitors being used are, 1 and 2 EMF-39 Containment Atmosphere Noble Gas, lEMF 17-2 EMF 2 Reactor Building Manipulator Crane, and 1 and 2 EMF-48 Reactor.
Coolant Activity Monitor. Health Physics will also provide portable monitoring equipment for containment atmosphere analysis in case of an accident event.
This event is reportable pursuant to Technical Specification 3.3.3.6.
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