ML20086K318

Telecopy AO 75-18:on 750213,DPIS-2-2-129C Failed to Respond to Change in Differential Pressure.Caused by Linkage Binding.Wiring Redressed,Switch Recalibr & Tested in Accordance W/Applicable Surveillance Test

ML20086K318
Person / Time
Site:	Peach Bottom
Issue date:	02/14/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086K314	List: ML20086K311 ML20086K318
References
AO-75-18, NUDOCS 8401270025
Download: ML20086K318 (1)

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• ttw tiv t t ts.e t e Ichruarv s=. 1975 t>v e u r r e n c e- l a ce r c : l'e b r u.a s v 13 1975 ractitty P e A sa h 6tA r r nfo A E ncs s c Puwwg $tarenn Ft . I8 1 Dwitu. Pwnnsylvanta 1 1.B it.

Tdentificarinn nt Ou s. u r r o s a s. w t Fan t ito re of dPI5-i'-t-L29C to'rempond t en c leansa a e in 41rforential p r e e stire .

C o rt d t t. L o n n. 2'rlur tu stectarra nce :

tJ ti l t 2 e h e s t e t own .

tteocriptiva of ticciarrence s Durinic a ruu t t ain A us t r ucer si t surveflaance trat, d P L S 2 - 12 98, felled en rewpurid tu es ditferent1al preamure atgnat.

D e w i ng n a t io n of App 4srent Geuse of Occiarrs'nre s

1. l u b.a w m tsluding sa m u s en d 1sv wiring within time switch.

Ana2yate of uccurrence:

The am a r ee t y l eip 11 c a t i o n s of this fatture are emi ss i em= 1 ts e c ais s e thin avitch in connected in a one-nf-two twice loate and would aio t h ea ve p re ve n t e d s ties c u r r e s.;c loop sir lec t i nn.

Corrective Actions

(* p on d i a.a a m a snte l y of the switch n e u e s6b 1 v . It was (nund t h a t.

connect.ing wirum wmu 1:stwrferinn with the ro w i t c ts 11:sk a r,e .

a n's ut s tie internal The wiring was redresseds the switch was recalthrated and t.te e r.e d in acenrdonen w i t.ti s tie a p p 11c a ts t er surveillance r e so r .

Pailure Datar ,

None previous.

Ve ry truly yours.

mC.T /?'* *

• s .e- L' hf. T. Ullrich. Superintendent Peach Bottom Atumic 1* owe r S t at ion s.:(

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