ML19305D780

LER 80-012/01T-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

ML19305D780
Person / Time
Site:	Vermont Yankee
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: ML19305D776 ML19305D780
References
IEB-79-14, LER-80-012-01T, LER-80-12-1T, NUDOCS 8004150514
Download: ML19305D780 (1)

Text

NRC F, ORM 364 U. S. NUcLGAQ RIULA1KKh/ CIN (7 7M . .

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

F CONTROL BLOCK: l 1

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(PLEASE PRINT OR TYPE ALL REQUIPED INFCRMATIUN) lo lil 8l 9V l TlLICENSEE 7

V l YCODE l S l 114l@lIS 0 l 0 l - l 0 LICENSE l 0 l 0NUM8ERl 0 l 0 l - l 0 l 2S0 l@l 26 4 LICENSE l 1 l 1TYPE l 1JOl 1 l@l l 57 CAT $8 l@

CON'r 1011I 5$,"C l L l@l 0 l 5 l 0 l 0 l 0 l 2 l 7 l1 69@l 01312 l81810 l@l014111118 74 75 REPORT DATE l080l@

7 8 60 61 OOCK ET NUMBER 68 EVENT OATE 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. I I

10181 1 80 7 8 9 E CODE SUSC E COMPONENT CODE SU8 CODE SU E 10191 7 8 l Xl X l@ lB l@ lB l@ l Sl Ul Pl Ol Rl Tl@ l Xl@ W @

9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION EVENT YE AR R EPORT NO. CODE TYPE NO.

LER-

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

, l218 2210 I 23 24 26 27 28 29 30 31 32 K N AC O ON PL NT VET HOURS S8 i POR 8. SUPPLIE MANUPACTURER lF l@y@ l zl@ l Zl@ l 0l 0l 0l 0l lYl@

33 34 JS 36 37 40 41 l42Y l@ l43Al@ l44Il 2 l 0 l 747!@

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lil0ll The cause of this event is deviations from the hanger design details. Aooronriate I 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. I I

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11 14 1 I 80 7 8 9 SA S  % POWER OTHER STATUS 015 O RY QiSCOVERY DESCRIPTION l1 ls ] l E l@ l 1l 0l 0l@l NA l l C l@l Investigation relating to NRC Bull. 79-[4 ACTIVITY CO TENT r.ELEASED OPRELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA l l NA l ITTs'l 7 8 9 I z I @ W@l to 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION l 1 l 7 l l 0 l 0 l 0 l@[Z j@l ,,

NA l PERSONNE L INJURIES NUMBER DESCRIPTION NA l R l0l0l0lhl 7 8 9 11 12 80 LOSS OP OR DAMAGE TO FACILITY TYPE DESCRIPTION LLL1J lz j@l NA l 10 80

, 7 8 9 PUBLICtTY NRC USE ONLY

• ISSUED DESCRIPTION ,

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

7 8 9 to j o 802-257-7711

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. P. Murohy 800415067 oNs;