ML19345B868

LER 80-179/03L-0:on 801023,review of Surveillance Instructions Revealed That SI-137.2,RCS Water Inventory, Performed Prior to Entering Mode 4 & Not Again Until 801015. Caused by Failure to Revise SI-137.2.Instruction Revised

ML19345B868
Person / Time
Site:	Sequoyah
Issue date:	11/21/1980
From:	Cottle W, Kirk G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345B862	List: ML19345B861 ML19345B868
References
LER-80-179-03L, NUDOCS 8012020633
Download: ML19345B868 (2)

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[o i2i l Review of s2rve111ance fastructions on 10-23-80 revealed that SI-137.2, RCS Water l

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piTT1 l Inventory, was performed or. 10-11-80 prior to entering rtede 4 and not performed I l o i 41 I again until 10-15-80. Surveillance requirement 4. 4.6.2.d requires that the RCS Water l I o ! 3 I I Inventory be performed every 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> when the unit is in nodes 1-4. There was no  !

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, , ; o ; [ SI-137.2 had not been revised to iacorporate the requirements of the latest revision g i,;,; Iof the Sequoyah Technical Specifications. The instruction has been revised to incor- ,

, , ; ,, ; porate the requirements of the latest revision of the technical specifications.

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iTcnn ssee Valley Authority

Sequoyah ' Nuclear Plant

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LER SUPPLEMENTAL:INFORMATION

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bQRO-50-327/80179Technical' Specification Involved 4.4.6.2.d Reported Under Technical-Specification 6.9.1.13.c1 Date of occurrence: '10-23-80 Identification and= Description of Occurrence:

'During a~ review of surveillance instructions on 10-23-80, it was. revealed that 51-137.2, RCS Water Inventory, was performed on 10-11-80 prior to entering nude 4 ~and not perforted again until 10-15-80. - Surveillance Requirement 4.4.6.2.d requires that the'RCS Water Inventory be-performed every 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> when the unit is -in nodes 4.

Conditions' prior to Occurrence:

From 10-11-80 to 10-15-80, the plant:was taken from mode 5 to critical on

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10-12-80, and experienced four (4) scrams and three (3) recoveries by 0959'CDT ;

on'10-13-80. . Subsequent to the. last scram cooldown' to node 5 was. initiated for condenser repairs. Plant was in mode 5 on 10-15-80.

Apparent Cause of Occurrence:

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SI-137.2 had Technical not been revised Specifications. to incorporate the requirements of the latest .

revision. Prior.to the l'ast revision, the Technical Specifications.had required the RCS Water Inventory every 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> when in

" steady stateo'~peration."- SI-137.2 still contained this old requirenent and since the unit never obtained steady state operation during the 10-11-80 to-10-15-80 time period,'the surveillance instructi,n was not performed.

Corrective Action:

. SI-137.2 has been revised'to-delete all reference-to " steady state operation."

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