AECM-83-0720, Updated Final RO 83-097/1:on 831003-18,auxiliary Bldg Main Steam Line Tunnel Temps Exceeded Tech Specs.Evaluation Concluded All Equipment in Steam Tunnel Qualified or Justified for Continued Operation

Updated Final RO 83-097/1:on 831003-18,auxiliary Bldg Main Steam Line Tunnel Temps Exceeded Tech Specs.Evaluation Concluded All Equipment in Steam Tunnel Qualified or Justified for Continued Operation

ML20081M691
Person / Time
Site:	Grand Gulf
Issue date:	11/04/1983
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-83-0720, AECM-83-720, RO-83-097-1, RO-83-97-1, NUDOCS 8311170339
Download: ML20081M691 (2)

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E(E MISSISSIPPI POWER & L Helping Build Mississippi P. O. BOX 1640,gC @$0 N. MIS SIS SIP PI 3 9 2 05 NUCLEAR PRODUCTION DEPARTMENT N November 4, 1983 U.S. Nuclear Regulatory Commission Region II 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30303 Attention: 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 83-097/1 - Update Report - Auxiliary Building Main Steam Line Tunnel Technical Specification Temperature Limit Exceeded

.I AECM-83/0720 This is an update to a previous report submitted on November 2, 1983.

The conditions for which the report was submitted occurred beginning on October 3, 1983, when the Auxiliary Building Main Steam Line Tunnel temperatures exceeded the 125'F limit of Technical Specification 3.7.8, The maximum recorded temperature was 127*F. The maximum temperatures and the cumulative times the limit was exceeded are listed below.

DATE TIME OF LCO MAXIMUM TEMPERATURE 10/3 - 10/4 25.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 125.5'F 10/5 - 10/6 13.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> 126*F 10/10 - 10/12 43.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> 127'F 10/17 - 10/18 37.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 127*F The results of our evaluation of the temperature effects on equipment operability is that all equipment in the steam tunnel is either qualified or justified for continued operation in accordance with NUREC-0588. All equipment was thermally aged at temperatures higher than those recorded in the steam 0311170339 831104 PDR ADOCK 05000416 S PDR

GFF P 5CIAL COPY v

( Sch Member Middle South Utilities System Ih

• AECM-83/0720 MISSISSIPPI POWE] O LICHT COMPANY #8*

line tunnel. We are in the process of recalculating the qualified lifetime of the equipment. This is a final report.

Yours truly, hk L. F. Dale 4

y Manager of Nuclear Services EBS/SHH:rg ec: 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. 20555 Document Control Desk U. S. Nuclear Regulatory Commission Washington, D. C. 20555 .

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