ML19259B952
| ML19259B952 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/11/1978 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 7906040246 | |
| Download: ML19259B952 (2) | |
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PHIIAD:.~ Fl!IA ELE'TB IC C3MFANY Peseh.3]tt?- Ate..le_ Power Static 7
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Delta. Fennsylvsnia 173 tl4 September 11, 1078
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Mr. Boyce E. Grier.-
Offict_pf Inspection. spd Enforceeg.nt.
_.631. Park Avenuk THIS DOCUMENT CONTAWS-Pe61on 1 traised ststes suelesr Pegulatory huission POOR QUAUTY PAGES-King. of Prussia FA 19h05 SUBTECT:
risG8!bLZ OCCT!PPENCE - FFOMFT NOTIFICATION Confir =ing W. "/-r U11 rich's cc. var.estion with Mr. G r++n: an, Pesion 1.
Uni.ted. States Nuclesr Pag sistary Cocz:!ssion en 9/6/.T.d..
. -Pererence:
Docket No. 0$0-277/2J8 Pesch Bottcas Ue.t.c 2 sn 1 3 -
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, Jechnical. Spacifiestien Beforences
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Beport No. 2-78-38/lF Occurrence Date:
09/08/78 Ident'Ification of Cccu.rrence:
Prelimin.ary unconfirraad esle-21stions indicate excessniva.secalerattana on the inboard resctor vster elesnup systan 4ac ts,tlen. vslre MO-15 durtrig a design basis earthque.
Conditions Frior to Occurrecc_e3
_ Both unitc opermting at full povar.
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Abpsrent-Cau.se Of Ge:r rence:
_ During the parfor nacea o f ca teut st I..a. t e tieter.-ina secalarati m - taina
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erperienced by vsr.icus prL.sr7 -c 'isnt vs1vas.sn u- -,n ri m -. -a tars t n rste o f 7 g vss esicuist e 1 f : r T7:a rasc t o r w=* r r c l a nnup af s t = - in5 sr1 isolation valve.
The Ecaptsbia accalarstion which tects sels.ic
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requirements is 3 g.
Analyt J of Occurren_ a:
Csiculations_hsw Indi es*.a 1 s11,ther primary c 7 L s.i*
inolettcq rstra.
at-the seceleration critaris.
Con fir-at ;r/
si-G s' ter a far this Esiva sr-in pregress.
Both the inner vs1va l '* '- L 5 insida ir ev=11) un i cuta - vsiva (p%
( M-13 cutsida dryva ll )
are
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Corritetive Action:
Additional supports t h this piping as'socisted with this ralve Ee,
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being designed sad materdal is being procurrad.
P-nd&ng emletron of design review theser supports will bd instal. lad on Unit 2 during the present refueling outage and on Unit. 3 at the first convenient outag+.
Previous Fallms:-
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None previous.
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Very tr117 yours, Y
W.
T,. Ullrich Superintendent VIU: cat
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