ML20086L256
| ML20086L256 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/25/1974 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086L252 | List: |
| References | |
| AO-74-15A, AO-74-15B, NUDOCS 8402080024 | |
| Download: ML20086L256 (2) | |
Text
.
A4A. s.u.,4.A a u a...;.u & 11v v v. ;,,, t y
j f
t Peach Potton Atomic ro.:er Station 2
3 Delta, Penncylvnnia
~
17314' di Ihrch 25,1974 g
-2 Mr. J m.ec P. O'Reilly, Director a
Unit <. : Ct t ec Atc~i c Ener; y Co.niccion I
DirNtcr"te of Eeculatory Operations t.71 Pa r': Ave: 2e
/ing of Fruccia, Pennsylvania 19406
-5 S :b ice + : Ab-or,1 Ocevre.,en 2h-IIc :r I:ctifiention 3
J Confircin; ty convencation with Mr. R. A. Feil, A.E.C. Region I l
Eegulatory Operationc Office on March 25, 1974.
1 JE
Reference:
Licence I! umber DPR 44, Amendment I! umber 1
-i A.
Technical Specification Table 3 2.3 j
B.
Technical Specification Table 3 2.A Report I!o. :
50-277-74-15A and 15B i
Repert Date:
March 25, 1974 4
Occurrence Date: '.rch 24,1974
.i Facili t;, :
icach Ecttom Atomic Pc.ter Station R. D.1, Delta, Pen:.cylvania 17314 3
-m Identification of Occurrence:
k A.
Setpoint chift on dPIS-2-2-1293.
2 B.
Setpoint shift on TS-2-12-99 ni d.
Conditienc Pridr to Occurrence:
'2 Plant shutdown.
m
=iw Deccription of Occurrence:
A.
During inctrument curveillance testing, dPIS-2-2-1293 tripped at 0.45 paid inctcad of within the Tech Spec limits of 0 5 to 15 pcid.
B.
During inctrument curveillance testing, TS-2-12-99 tripped at g
approximately 142 F instead of within the Tech. Spec limit of 1 140 F.
h Decignation of App rent Cauce of Occurrence:
_i
.tnability of culte.n to hold precice cetpoints. This type of W
h.
switch is precently under ctudy as to proper ap^olication.
B.
Obvious cetroint drift.
- y Ana,yc1c of Occurrcnce:
A.
The setpoint chift of dPIS-2-2-129; would not have defeated the logic to produce the required correct loop celection. The j
remaining cultenes in thic logic were t ithin specifications and it would have produced the proper action.
B.
The cetroint chift of TS-2-12-99 was minor and would not have teacurnb}y affected plant or public safety.
1 1
s I
8402080024 740403 p Hq 1
ot?y 7]
05000277 P,DR ADOCK m
x
-4
s 6
o J Cfr
" r. i v e /.c t i on :
Ea t;. c.;; tel c - re reculibrated, tecte:1 n:ul r, turned to cervice.
3 9r u11;,+._iti;l -::.tchen ar. alreaci.'t part of the Group being n.
4.<.,.-... a,.
2.,
B.
Tho.
t <.
- turo rcitch will be invcrtic,ted becauce there is inelication of previouc cetroint drif t.
Fail: e P-ta:
A.
The pIrticular c.: itch 1;,0 no previouc hictory of failure, but thic t:~e of r.: itch + :n failed ceven timec previoucly in variouc rervicec.
B.
The tcrporature c.zitch h c been found outcide of crecc previoucly,,but that failure,:ac found to be due to cet ting the c.: itch tea cloca to the decired limit.
See Abnormal Occurrence Ecport dated October 1, 1973 f'
- ,/ c'. s /.~,.,,,/*
R. G. Fleiccir.,nn, II Peach Ecttom Atomic Power Station l
l