05000327/LER-1980-179-03, /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

/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: 05000327/LER-1980-179, Forwards LER 80-179/03L-0 05000327/LER-1980-179-03, /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
References
LER-80-179-03L, NUDOCS 8012020633
Download: ML19345B868 (2)

LER-1980-179, /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

Event date:
Report date:
3271980179R03 - NRC Website

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'4 62 EVENT DAfg 14 JS fitPGA f oat t 6) cvENT ot:CalPflCN ANo PAOS ABtt CONSECUENCES h [o i2i l Review of s2rve111ance fastructions on 10-23-80 revealed that SI-137.2, RCS Water l

piTT1 l Inventory, was performed or. 10-11-80 prior to entering rtede 4 and not performed I

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Sequoyah ' Nuclear Plant LER SUPPLEMENTAL

INFORMATION 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 not been revised to incorporate the requirements of the latest.

Technical Specifications. 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 state '~peration."- SI-137.2 still contained this old requirenent and o

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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