05000327/LER-1980-007-01, Engineering Found That Incorrect Valve Operator Weights Were Used for Seismic Analysis of Component Cooling Water Sys Valves.Caused by Incorrect Weights Shown on Drawings

Engineering Found That Incorrect Valve Operator Weights Were Used for Seismic Analysis of Component Cooling Water Sys Valves.Caused by Incorrect Weights Shown on Drawings

ML19340B253
Person / Time
Site:	Sequoyah
Issue date:	10/14/1980
From:	Cottle W, Kirk G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340B248	List:
References
LER-80-007-01X, LER-80-7-1X, NUDOCS 8010210703
Download: ML19340B253 (2)

LER-1980-007, Engineering Found That Incorrect Valve Operator Weights Were Used for Seismic Analysis of Component Cooling Water Sys Valves.Caused by Incorrect Weights Shown on Drawings

Event date:
Report date:
3271980007R01 - NRC Website

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.I o i:l l With Unit 1 in Mode 6 following initial core loading, notification was received ggl from TVA Division of Engineering Design that incorrect (non-conservative) valve 1o,A t{ operator weights were used in the seismic analysis for component cooling water [ol3; j valves FCV-70-133,'134, and 183 (T.S.6.9.1.12.h).

There was no effect upon public jc sjl health or safety. Previous occurrences - none.

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Tennessee Valley Authority Sequoyah Nuclear Plant LER SUPPLEMENTAL INFORMATION UPDATED REPORT - PREVIOUS REPORT DAT; 3-28-80 SQRO-50-327/80007 Rev. 2 Technical Specification Involved 6.9.1.12.h Reported Under Technical Specification 6.9.1.12.h Date of Occurrence:

3/15/80 Time of Occurrence: 0900 EST Unit 1 Identification and Description of Occurrence:

Notification was received frem TVA Division of Engineering Design that

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incorrect (non-conservative) valve operator weights were used in the seismic analysis for component cooling water valves FCV-70-133,134, and 183.

Conditions Prior to Occurrence:

Unit 1 in Mode 6 following init'ial core loading.

Action specified in the Technical Specification Surveillance Requirements =et h

due to inocerable eaufreent. Describe.

j ii/A fpparent Cause of Occurrence:

Iacorrect valve operator weight used in seismic analysis due to error on vax e vendor drawings.

Analysis of Occurrence:

There was no effect upon public health or safety.

Corrective Astion:

The seismic ana.ysis was rerun using the correct valve op-rator weights.

No physical changes were required.

Failure Data:

N/A