05000338/LER-1981-028-03, /03L-0:on 810511,component Cooling Pipe Support & Snubber Removed Per Design Change 80-S46.Caused by Snubber Listed in Both Units 1 & 2 Tech Specs Although Installed on Unit 2 Piping of Common Sys.Snubber Deleted from Tech S

/03L-0:on 810511,component Cooling Pipe Support & Snubber Removed Per Design Change 80-S46.Caused by Snubber Listed in Both Units 1 & 2 Tech Specs Although Installed on Unit 2 Piping of Common Sys.Snubber Deleted from Tech Specs

ML20004E754
Person / Time
Site:	North Anna
Issue date:	06/08/1981
From:	Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004E752	List: 05000338/LER-1981-028, Forwards LER 81-028/03L-0 05000338/LER-1981-028-03, /03L-0:on 810511,component Cooling Pipe Support & Snubber Removed Per Design Change 80-S46.Caused by Snubber Listed in Both Units 1 & 2 Tech Specs Although Installed on Unit 2 Piping of Common Sys.Snubber Deleted from Tech S
References
LER-81-028-03L-01, LER-81-28-3L-1, NUDOCS 8106150180
Download: ML20004E754 (2)

LER-1981-028, /03L-0:on 810511,component Cooling Pipe Support & Snubber Removed Per Design Change 80-S46.Caused by Snubber Listed in Both Units 1 & 2 Tech Specs Although Installed on Unit 2 Piping of Common Sys.Snubber Deleted from Tech Specs

Event date:
Report date:
3381981028R03 - NRC Website

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U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT ONTROL BLOCK / / / / / / / (!)

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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LICENSEE CODE LICENSE NUMBER LICENSE TYPE CAT

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RE OR

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(8) / 0/ 6/ 0/ 8/ 8/1/ (9)

E DOCKET NUMBER EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES (10)

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/ On May 11, 1981, with Unit I at 100% power and Unit II in Cold Shutdown, a com- /

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/ ponent cooling pipe support and snubber was removed as per design change 80-S46 /

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/ (ARS (Amplified Response Spectrum) Review). However, at the time of removal, the /

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/ snubber (a Unit II component) was also listed in Unit I Technical Specifications./

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/ Since the snubber was not installed on a Unit I system, and the ARS review had

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/ determined the snubber was not required, the public health and safety were not

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/ affected.

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SYSTEM

CAUSE

CAUSE COMP.

VALVE

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CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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/W/B/ (11) /A/ (12) /X/ (13) /S/U/P/0/R/T/ (14) [Z/ (15)

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SEQUENTIAL OCCURRENCE REPORT REVISION LER/R0 EVENT YEAR REPORT NO.

CODE TYPE NO.

(17) REPORT NUMBER

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ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (27)

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/ The Field Change to remove the snubber was approved for Unit II while Unit II was/

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/ in Mode 5 thereby complying with Technical Specifications. However the personnel /

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/ involved were not aware that the snubber was also in Unit I Technical Specifica- /

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/ tions. The snubber was subsequently deleted from both Unit's Technical Specifi- /

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/ cations.

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FACILITY METHOD OF STATUS

% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION (32)

/1/5/

/E/ (28)

/1/0/0/ (29) /

NA

/ (30) /A/ (31) / Engineer Observation /

ACTIVITY CONTENT RELEASED OF RELEASE AM0LWT OF ACTIVITY (35)

LOCATION OF BELEASE (36)

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PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION (39)

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NA

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PERSONNEL INJURIES NUMBER DESCRIPTION (41)

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LOSS OF OR DAMAGE TO FACILITY ( 3)

TYPE

DESCRIPTION

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PUBLICITY ISSUED DESCRIPTION (45)

NRC USE ONLY

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NA

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NAME OF PREPARER W. R. CARTWRIGHT PHONE (703) 894-5151 810 615 019EC)

e Virginia Electric and Power Company North Anna Power Station, Unit 1 Attachment: Page 1 of 1 Docket No. 50-333 Report No. LER 81-028/03L-0

Description of Event

on May 11, 1981 with Unit I at 100% power and Unit II in Mode 5 (cold shutdown) a component cooling system pipe support was removed as per design change 80-S46 (ARS Review). At the time of removal, the snubber (a Unit II snubber on a Unit II system) was listed in both Unit's Technical Specifications. For Unit II in Mode 5 the removal of this snubber was permitted but its removal was not permitted by its inclusion in Unit I technical specifications. This is reportable pursuant to T.S. 6.9.1.9.b.

Probable Consequences of Occurrence Since the snubber removed was installed on Unit II system piping, its inclusion in Unit I technical specifications was not warranted.

Consequently, its removal while Unit II was in cold shutdown (Mode 5) where operability was not required was permitted. Therefore, the public

~~ ~~

heaTttr'AYa safety were not attected.

Cause of Event

At the time of removal the. snubber in question was listed in both Unit I and Unit II technical specifications although it was ins.alled on Unit II piping of a common system. The personnel involved were not aware that this snubber was listed in both units technical specifica*. ions.

The removal of the snubber while permitted for Unit II in Mode 5 (cold shutdown) where its operability was not required, was not permitted for Unit I which was in Mode 1 at 100% power.

Immediate Corrective Action

Written concurrence from the NRC was secured deleting the subject snubber from Technical Specifications of both unit's.

Scheduled Corrective Action No scheduled corrective actions needed.

Actions Taken to Prevent Recurrence This was an isolated incident. The administrative controls are adequate.

Generic Implications There are no generic implications to this event.