05000368/LER-1982-033-03, In Mode 6,safety Injection Check Valve LSI-13C Stuck in Open Position When Stroked by Hand.Caused by Protruding Valve Disc Stud Interfering W/Body & Holding Disc in Open Position

In Mode 6,safety Injection Check Valve LSI-13C Stuck in Open Position When Stroked by Hand.Caused by Protruding Valve Disc Stud Interfering W/Body & Holding Disc in Open Position

ML20028F284
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/18/1982
From:	Rodgers P ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20028F275	List: 05000368/LER-1982-033, Forwards Corrected LER 82-033/03L-1 05000368/LER-1982-033-03, In Mode 6,safety Injection Check Valve LSI-13C Stuck in Open Position When Stroked by Hand.Caused by Protruding Valve Disc Stud Interfering W/Body & Holding Disc in Open Position
References
LER-82-033-03L, LER-82-33-3L, NUDOCS 8301310338
Download: ML20028F284 (2)

LER-1982-033, In Mode 6,safety Injection Check Valve LSI-13C Stuck in Open Position When Stroked by Hand.Caused by Protruding Valve Disc Stud Interfering W/Body & Holding Disc in Open Position

Event date:
Report date:
3681982033R03 - NRC Website

text

s NRCIONM366 U.S. NUCLEAR REGULATORY COMMISSION (7-77)

LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK: 1_l_l_i_l_l_6 l

11 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

IT 7~lIl 9_A_l"ITC M E IC06 Fl_2 12 l

RlAINl0 1F,0_l_ _I ITCDi5E nUMBTRl_0__l, _,l_0_]75 101 0l0l0l0 O 13 14 1 1 1 l 1 1 1 14 l l

15 2 I lU CERIT TYPE 7 0 STEAT 58 I4 8

7 11l SOURCE 66 16 10 ~8 REPORT l L 6Fl011lT5 CRIT lNURBER-l_6_l~817 010 013 l11011 8I8 2 18 68 6F 1vDiTl6 ATE ~l-74 7 F l 7 EPURT DAT F1 1 l1 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES 10 l1111 l0n 10/18/82 while in Mode 6 safety infection check valve 2SI-13C stuck in the open position when stroked by l l1l1l lhand. This hand stroking operation was initiated as a result of recommendations of IE Notice 81-30.

The l

11l11 l hand stroking operation was performed when the bonnet was removed during maintenance activities. The three l

l1l1l l counterpart valves (2SI-13A, 251-13B and 251-13D) were inspected and hand stroked. Valve 2SI-13B also stuck l

l111l lwhen hand stroked. These valves are the first of two check valves between the high pressure safety infection l l111l l(HPSI) header shutoff valve and the injection nozzles. This occurrence is reportable per T.S. 6.9.1.9.b.

l 11111 l

l 7

8 9 80 SYSTEM

CAUSE

CAUSE COMP VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE ITlTI 9 _l F 111 l_S l B 112 i B 113 lV 70 1T-IF IT~l_A_l_L_1_V_lil~x 114 i C 115 iA T8 1F 26-116 7'"- ~8 SEQUENTIAL OCCURRENCE REPORT REVISION LER/R0 l EVENT YEAR REPORT NO.

CODE

- TYPE NO 17 REPORT l l8 2l l---I l_21-~l72 2T-2Fl~l76 27~I 28~-l 7 9 35--l 3I--l 3F l0 3

3l l/

l0 3l lL l---

l1i NUMBER ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRD-4 PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB SUPPLIER MANUFACTURER 118 l19 l20 121 l_0_l_0_I 22 123 124 125 l _0_ l _8__l 26 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 l1ll]

j!nvestigation revealed that the valve disc stud for 2SI-13C protruded far enough above the disc nut to l

l1111 l Interfere with the body and hold the disc assembly in the open position. The' vendor drawing showed the disc l

l1111 lstud to be flush with the top of the dise nut.

The portion of the disc stud that protruded above the nut was l l1l1l l filed of f leaving the top of the stud flush with the top of the disc nut.

Valve 251-138 stuck because the l

l1l11 l disc was misaligned and allowed the disc to stick against the side of the body. This interference resulted I

7 8 9 80 FACILITY METHOD OF STATUS

% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION l1111 l

l0l i

NA 130 l C 131 l Special Instruction l32 9_H_l28 15- _0,,1~0 129

'I2 13 44 4F 46 80 7

8 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Ill_Tl l Z_l33 l Z 134 i NA 135 i NA 136 1F 11 44 45 80 7

8 9 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

11111 11],0_l710 137 l Z l38 i NA 139 9

IT-13 80 7

8 PERSONNEL INJURIES NUMBER

DESCRIPTION

lllTl 10 NA 9-- 1 1 1 0 l40 i l41

~8 71 12 80 7

LOSS OF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

l1l11 l11421 NA 143 PUBLICITY 8301310338 830120 ISSUED DESCRIPTION PDR ADOCK 05000368 NRC USE ONLY 11111 l_N_l44 i NA S

PDR 145 l l l

i 63 -l- -l-l ;- i i l i iEO 7

8 9 10 68 NAME OF PREPARER Patrick Rodgers PHONE: (501) 964-3100

o.

e>*

ATTACHMENT LER No. 50-368/82-033/032-0from the bushings being improperly positioned. The bushings were repositioned so that the valve functioned properly with no sticking throughout the full stroke of the valve.