05000271/LER-1980-012-01, /01T-0:on 800328,during Seismic Analysis Required by IE Bulletin 79-14,discovered That Pipe Supports RHR-H-83 & RSW-H-168 May Be Inadequate to Support Seismic Loads. Caused by Deviations from Hanger Design Details

/01T-0:on 800328,during Seismic Analysis Required by IE Bulletin 79-14,discovered That Pipe Supports RHR-H-83 & RSW-H-168 May Be Inadequate to Support Seismic Loads. Caused by Deviations from Hanger Design Details

ML19305D780
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	04/11/1980
From:	Murphy M VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19305D777	List: 05000271/LER-1980-012, Forwards LER 80-012/01T-0 05000271/LER-1980-012-01, /01T-0:on 800328,during Seismic Analysis Required by IE Bulletin 79-14,discovered That Pipe Supports RHR-H-83 & RSW-H-168 May Be Inadequate to Support Seismic Loads. Caused by Deviations from Hanger Design Details
References
IEB-79-14, LER-80-012-01T, LER-80-12-1T, NUDOCS 8004150514
Download: ML19305D780 (1)

LER-1980-012, /01T-0:on 800328,during Seismic Analysis Required by IE Bulletin 79-14,discovered That Pipe Supports RHR-H-83 & RSW-H-168 May Be Inadequate to Support Seismic Loads. Caused by Deviations from Hanger Design Details

Event date:
Report date:
2711980012R01 - NRC Website

text

NRC, ORM 364 U. S. NUcLGAQ RIULA1KKh/ CIN F

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1.lCENSEE EVENT REPORT LER 80-12/1T k

CONTROL BLOCK: l l

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l l Ih (PLEASE PRINT OR TYPE ALL REQUIPED INFCRMATIUN)

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7 8 9 LICENSEE CODE 14 IS LICENSE NUM8ER 2S 26 LICENSE TYPE JO 57 CAT $8 CON'r 1011I 5$,"C l L l@l 0 l 5 l 0 l 0 l 0 l 2 l 7 l1 @l 01312 l81810 l@l014111118 l0 l@

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60 61 OOCK ET NUMBER 68 69 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 l During the seismic analvses to determine the adequaev of seismic suonorts as required l l0131 lby NRC letter of 10/24/79 and Bulletin 79-14, it was discovered that pipe supports l

10 l.: l l RHR-H-83 and R.W-H-168 may be inadequate to support their seismic load as manufactured!

l0isl l In accordance with that letter, required modifications were ecmpleted within 7 days.

l 10 ls l l Engineering evaluations have determined that system components were not inoperable.

l l 0 l 7 ) l Previous failures were reported as RO 79-33/IP and 34/1P.

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10181 1 80 7

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CODE SUSC E COMPONENT CODE SU8 CODE SU E

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10191 7

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER-EVENT YE AR R EPORT NO.

CODE TYPE NO.

@,agoRO l218 10 I l-l 1 01 11 21 1/l 10111 1 Tl 1-1 1 01 g

22 23 24 26 27 28 29 30 31 32 K N AC O ON PL NT VET HOURS S8 i POR 8.

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33 34 JS 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lil0ll The cause of this event is deviations from the hanger design details.

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i1 l1l l modifications to the subject pipe sulport systems were performed to insure thnt l

I1 12 I l the systems meet the requirements of our seismic analvsis.

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11 14 1 I 80 7

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% POWER OTHER STATUS 015 O RY QiSCOVERY DESCRIPTION NA l

l C l@l Investigation relating to NRC Bull. 79-[4 l1 ls ] l E l@ l 1l 0l 0l@l ACTIVITY CO TENT r.ELEASED OPRELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA l

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8 9 to 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

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l 1 l 7 l l 0 l 0 l 0 l@[Z j@l PERSONNE L INJURIES NUMBER

DESCRIPTION

l R l0l0l0lhl NA 80 7

8 9 11 12 LOSS OP OR DAMAGE TO FACILITY TYPE

DESCRIPTION

l LLL1J lz j@l NA 80 7

8 9 10 PUBLICtTY NRC USE ONLY ISSUED

DESCRIPTION

NA l

llllIllIIIlIIi L2,,j,,oJ ' W h l 68 69 80 ;

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