05000321/LER-1980-001-01, While Performing Maint During Cold Shutdown,Personnel Noted Clevis Pin Missing from Strut on Drywell Penetration Restraint E11-X13B.Caused by Improper Installation.Substitute Pin Installed

While Performing Maint During Cold Shutdown,Personnel Noted Clevis Pin Missing from Strut on Drywell Penetration Restraint E11-X13B.Caused by Improper Installation.Substitute Pin Installed

ML19296B406
Person / Time
Site:	Hatch
Issue date:	02/13/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19296B403	List:
References
LER-80-001-01X, LER-80-1-1X, NUDOCS 8002200520
Download: ML19296B406 (3)

LER-1980-001, While Performing Maint During Cold Shutdown,Personnel Noted Clevis Pin Missing from Strut on Drywell Penetration Restraint E11-X13B.Caused by Improper Installation.Substitute Pin Installed

Event date:
Report date:
3211980001R01 - NRC Website

text

NitC 6 0Rt.13r,G u. :.. sv ut.L t an n e u v a.n e v n e t,v...r..a.,ae viv (7-7 LICENSEE EVENT REPORT Update Report - Previous Report Date 1-19-80 CONT ROL BL OCK: I l

l l

l lh (PLE ASE PRINT OR TYPE ALL HEQUIRED INFORMAllON) i o

[o_l ij l C AjElIlH I j@[0 0l-l0l0l0 0l0l-10lOl(aji, l1 l1 ]1 l 1 l@[_ l l@

7 8

'J LICEMEE LGOE I4 3D LICENSE NUVSE H 2 '>

/b LICE %E 1YPL JO 57 C AI 54 COvT lolil "7 "' I t l@l 015101010131211 l@l 0 110131810l@[01211131810l@

?

8 kJ te l DOCK E T NU'/P E R e4 VJ EVENT DATL 74 75 HFFORT DAT E 80 EVENT DESCRIPTION AND PROBADLE CONSEQUENCES h I With Unit 1 in cold shutdown, while performing maintenance on RHR LPCI injection valvel o

2 10131 l E11-F015B on 12-18-79. maintenance personnel noticed a clevis pin was missint, from a i

la 141 LttntLoA_drymell p.ene_tration restrain 3El-x13n.

On 1-3-80. it was determined the i

lo Isl I missino clevis pin was reportable per Tech Snecs section 6.9.1.8.i.

There were no I

lo Ic i Leffects_upon p.ublir_healib and safety.liue to this event.

Inspection of nin held dev-1 IoI7i Li.c eLa n_Unjis._La.nd_2_was_p_e.do rme d.

This is a non-renetitive occurrence.

l l 0 lh l W

7 8 9 SYSTE*1 C A U",E CAUst C O*M P.

VAtVE CODE CODE SUCCODE COMPONENT CODE SUBCODE SUSCODE l Cl Fl@ IB l@ lC l@ IS lU lP l0 lR IT l@

X @ [z_J @

O 9

7 H

9 10 11 12 13 13 19 2u SEQUEN11 AL OCCURRENCE RE F ORT F;E V8SIO N LE EVE NT YE AH HEPCHTNO.

CODE TYPE NO.

@,g.R. POI al 01 l-l 10 10 11 1/1 10111 1xI L-1 llJ

.g;

_ 21 22 23 24 26 27 23 2')

30 31 32 T AKE 4 ACT O ON PL f4T

/1 HOURS 22 SC IT D FO 1 UO.

5 PLI MAN FA T 'RE R

. l A l@l zj@

I z'l@

[z_l@

10 10 0 lY I LYJ@

LijJO I ^ @

IB 2 l0 l9 lg 33 J4 J

30 Je 40 41 42 43 44 47 cAUSE DESCRIPTION AND CORRECTIVE ACTIONS h LThe cause of the missing clevis pin was imoroper installation.

A substitute clevis I

i o

li li l l oin was fabricate d and installed on 1-4-80.

A clevis pin was made from the criainal 1

lil2; I pin material (SA 193 B7) was installed on 1-6-80.

Inspection of additional pin held I

11131 ] devices was performed on Units 1 and 2.

No further inspections are planned.

No fur-l I ther reportina is reauired.

l-i 4

80

?

8 9 si

% POWE R OTHE R ST AT US ISCOV DISCOVERY DESCRIPTION li Is I LcJ@ 101010!@l NA l

l Al@l Personnel Observation AYOUNT OF ACTIVITY @ l LOCATION Or REM ASE @,

AC11Vl1 Y CO

..NT RM ASE D OW1 A%

NA l

NA

- l l' 161 L7J @ LZJ@l 7

8 9 to 11 44 45 80 PE HSONNE L E <PO5UD ES NUP/M F H TYPE

DESCRIPTION

101 Ol_ oj@LZJ@l N^

l i

7 PEH50NNE L INJUDIES NtJYRE R

DESCRIPTION

l 01 0 OJ@l NA l

i s 80 7

8 9 11 12 L OSS Or On DAVAGE 10 F ACIL11Y TYPE DE SCHIP i t O N ITF11 zi@l NA I

7 8 9 10 80 issy E CHiPTION FJiB Lnf@l NA I

IIIIIIIIIIIIIi 08 69

80. G

.,,7 u a 10 NAME OF PREPAnEn _ C. l. Conain, Supt. pit. Ena. Serv. PnoyE:__919-367-7781 2,

LER A:

50-321/1030-001, Rev.1

~

Licensee: Georgi.a Power Company Facility:

Edwin I.

Hatch

Narrative

Report for LER 50-321/1080-001, Rev. 1 With Unit 1 in cold shutdown for gene"ator roto- "cpair, while performing maintnenance on RHR LPCI injection icive E11-F015B on 12-18-70, maintenance pe"connel noticed a c' avis pin was nissing from a

struc on drywell penetration restraint E11-X13B.

The missing clevis pin affected only one of the four struts on the E11-X13B restraint.

On 1-3-80, the mi.ssing c l. e v i n pin was determined to be reportable pe" Tech Specs section 6.0.1.8.1.

This type of restraint connection is conmon to both units at Hatch.

Inspection of pin held devices on Units 1 and 2 was pe" formed.

There were no effects upon public health and safety due to this event.

This is a

non-repetitive occurrence.

The

cause

of the missing clevis pin was imorcoon installation.

A substitute elevis pin was fabriented of AISI 10 fl 5 - F 2 carbon steel and inst,alled on 1 18 80.

The original pin was made from SA 193 B7 material.

When the SA 101 B7 natorial was obtained, a new clevis pin was fabricated and installed on 1-6-30.

As a

result of the discrepancies found on the E11 hanger devices in which one clevis pin on penetration X-13B was missing, additional suoport devices for Unit 1 were inspected to see if any othen devices had discreoancies.

In addition to the clevis pin in X-138 being missing, one cotter pin was found to be missing from one of the horizontal clevis eins in this anchon.

- The clevis

pin, however, was intact.

On penetration anchor X-13A, one cotter pin from a

vertical clevis pin was,found missing and the c l. e v i s oin showed evidence of movement although it was still i n.t a c t.

Penetration anchors on X CA&B were insocoted and found to have two small cotter oins insta' led in olace of the required single cotter pin.

On penetration anchors X-7A, B,

C, and D,

two cotter pins were found that had not been spread.

All clevis pins on penetrations X CA&R and X-7A, B,

C, and D were intact.

Addition 11 inspections were performed on pin held devices in the Unit I drywell prior to reactor startuo.

Aporoximately

(

300 nin held devices were inspected with the f o ll ou i n st findings.

Nine cotter pins were found missing during inspoetion, A 1.1 clevis pins in these devices we"e still 4

k

5 intact.

Three devices were found to have an undersized cotten pin or wire inseated in the hole.

Acain, the clevis pins were

(

i r. t a c t.

Two variable spring hangers were found to be disconnected: one from an instrument line on B-11 system and identified as B-31-X fl0IF9, and the othe" was on a

stem leak-off line to valve E-21-F007

Causes

for these two devicca being disconnected could not be determined.

The missing bolts on these two hangers were reported on Devia.lon Report 1-80-10 The bolts were replaced and double-nutted to prevent recurrence of the e.v e n t.

All discrepancies found during this insoection were corrected prior to devuell closecut.

The inspection

' dates for the aforenentioned devices were 1-3 and 1 4-80.

On 1-5-80, additional inspection of pin sold devices were performed in accessible areas in the reactor building on safety related systems.

Approxinately 162 devices were inspected.

Of these devices, none were found to have cotter pins nissing, and all devices were intact.

Based on the findines of the inspection of these 400-plus devices, no further inspection of pin held devices is planrod for Unit 1.

The surveillance on Unit 2

pin. held devices in accesstble areas was performed on the following systems:

2E11, 2E21,

2E41, and

?E51 There vere.100 devices inspected, all of which had clevis pin type-connections.

Of the 100 devices inspected, all were found to he intact and per forning their required function.

The inspection did reveal that of the 100 devices checked, four clevis pins were found to have a cotter pin nissing.

These missing pins were

replaced, and in addition, one cottea pin that was broken was replaced.

Three other cotter pins were spread to a more conservative position.

Due to the fact that out of a samole of 100 devices checked, only four cotter pins were found to be missing, and that all clevis pins were still intact and the devices were performing their intended function, no further inspection in accessible areas of these type devices for missing pins is planned at this tino.

On 1-27-80, w'.5. Unit 2 in cold s h u-t d o w n, a randon inspection of clevis a r. a cotter pins in safety related pipe supports in the Unit 2 drywell was perforned.

A total of 83 devices were. inspected, and with the exception of one, all were found to be in a good state of repair.

One device did not have a cotter pin installed in the clevis pin, llo u e v e r, it did have a wire inserted in the cotter nin hole.

This wire was removed and the correct size cocter pin was j

installed.

This devices was not in a degraded condition and was performing its intended function.

Th!s concludes thn inspections for c o t t e r. p'i n s and clevis pins 0g" Unit 1 and Unit 2.