ML20024F478

RO 83-072/0:on 830729,30 & 0814-16,control Room Air Temp Exceeded Tech Spec Limit.Caused by Lack of Operating Control Room HVAC Subsystems & Low Freon in Subsystem B, Respectively.No Corrective Action Stated

ML20024F478
Person / Time
Site:	Grand Gulf
Issue date:	08/29/1983
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-83-0518, AECM-83-518, RO-83-072-0, RO-83-72, NUDOCS 8309090416
Download: ML20024F478 (2)

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August 29, 1983 GJ 8Q g NUCLEAR PRoOUCTloN DEPARTMENT U. S. Nuclear Regulatory Commission 4['SS Region 11 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30303 Actention: Mr. J. P. O'Reilly, Regional Administrator

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-13 File 0260/L-835.0 Special Report 83-072/0 -

Control Room Ambient Air Temperature Exceeds Technical Specification Limit AECM-83/0518 From 2135 hours0.0247 days <br />0.593 hours <br />0.00353 weeks <br />8.123675e-4 months <br /> on July 29, 1983, until 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> on July 30, 1983, the Control Room ambient air temperature exceeded the area temperature limit of Technical Specification 3.7.8-1.c (77*F). The excessive area temperature was a direct result of no operating Control Room HVAC subsystems. At the time of the event, subsystem "A" was inoperable due to compressor maintenance, and subsystem "B" was load shedded during performance of an eighteen (18) month functional test for the Division II Diesel Generator. The area temperature exceeded the Technical Specification limit for a total of 10.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> with a peak recorded temperature of 80*F.

From 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on August 14, 1983, until 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> on August 16, 1983, the Control Room ambient air teeperature exceeded the area temperature limit of Technical Specification 3.7.8-1.c (77*F). The excessive area temperature was a direct result of low Freon in the "B" subsystem. Subsystem "A" was inoperabic due to compressor maintenance. The temperature exceeded the limit for a total of forty (40) hours with a peak recorded temperature of 79"F.

The maximum qualification temperatures vary for different types of equipment in the Control Room. All Control Room equipment is qualified to at least a maximum qualification temperature of 90*F, therefore, an analysis to demonstrate operability of this equipment is not required. This is reported as a Special Report pursuant to Technical Specification 6.9.2.

Yours truly, 8309090416 830829 des N t DR ADOCK 05000 L. F. Dale Manager of Nuclear Services EBS/SHH: sap Y'gy4 cc: (See Next Page)

, OYygCb Member Middle South Utilities System

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, AECM-83/0518 Page 2 g MISSISSIPPI POWER & LIGHT COMPANY cc: Mr. J. B. Richard Mr. R. B. McGehee Mr. T. B. Conner Mr. G. B. Taylor Mr. Richard C. DeYoung, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20553 Document Control Desk U. S. Nuclear Regulatory Commission Washington, D. C. 20555

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