ML19322B938: Difference between revisions
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=Text= | =Text= | ||
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1 | |||
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PillLADELPillA El.ECTRIC COMPANY Peach 19attom Atomic Power Station | |||
. Hotra, Ponnsylvania 17314 Deccaber 10, 1979 0 | |||
0 D Mr. no yce H. Grier Office of Inspection and P.nforcement ' ' | |||
u | |||
.c j uegion'1 United States Nuclear Regulatory Coeusission n[} D g- - | |||
'. 3 | |||
, | |||
A l | |||
' | |||
631 Park Avenue +.. yU _S,.I -a: . | |||
-.ag(! 7,i,4 | |||
. . | |||
; King of Prussia, PA 19406 ' | |||
- | |||
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==SUBJECT:== | |||
REPORTABl.H OCCURRENCE - PROMPT NOTIFICATION con fi nei n t 4 s. Plot schmann's conversation with Mr. Creanman Rogion I, United Status Nuctuur ltogulatory Commission on Decumber 7,1979. | |||
, | |||
Refer ince: pocket No. 50-277 l Pench Rottom Unit 2 | |||
! Tuchnical Spucification Hoforeneus: 6.9.2.u(2), 3.7.D.3 l | |||
l Heport No. 2-79-53/ IP l | |||
. | |||
Occurrence Dato: 12/7/79 Identification of Occurrence: " .m Unit 2 r-circulation system sample line outor valve isolation function inoperable. | |||
Appa ren t Cause of occurrenco: | |||
Improper testing following installation of a jumper. | |||
l l Analysis of Occurrence: | |||
' | |||
1 A jumper was installed in the control circuit on 5/20/79 during an investigation of the inability of the Unit 2 recirculation system sample isolation valve A0-2-2-40 to open in response to a manual signal following a modification to assure electrical separation. Because the jumper restored manual eperat ton and because the individual doing the work be11oved that the | |||
.tumper only restored :ircuit continuity, no testing of the isolation cep-hility of the valve was done. The juusper was desir logged in the jissper tog per procedure. On 12/7/79, during preparation for testEng | |||
' | |||
of another modification this jumper was recognized to inhibit automatic isolation of that waive. However, the inner isolation valve was not affected and would have automatically isolated upon roquest. Becauso | |||
* the innor isolation rutvo would have isolated and the outer isolation valvo could be operated manually, the line could have been isolated if necessary. | |||
Corrective Aetion: A - | |||
( | |||
. | |||
The jtamper was removed upon discovery. Both valve 6 were tested for 4 | |||
- | |||
manual and automatic isolation and were found to I a ftally operable. | |||
Am imunediate review was made of jumper los entrie- concoming RP5, p | |||
ECCS, and PCIS circuitry and no abnormalities wet e found. A roview a.m4. twq4e. m .7.h w .,. 7012190' .a .34ss | |||
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2-of the jmsper tog procedure wt11 be made to determine Lf revision is nece as.4ry . | |||
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Imme Very truly yours, | |||
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Revision as of 04:14, 14 December 2019
ML19322B938 | |
Person / Time | |
---|---|
Site: | Peach Bottom ![]() |
Issue date: | 12/10/1979 |
From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
To: | |
References | |
NUDOCS 7912190566 | |
Download: ML19322B938 (2) | |
Text
- - _ __ - - . _ _ _ . . _- -
1
..,. g~,.= m ,4,. . , J,{ .. ,gr,_ q . . ,,,.,g, .y ,, j,
. ,-a..~e f .*.4..
- p. .
. ...* .c~i+M r y. .v.-
- a .
. e-m '- 7.c 1(g, *. y +. ...r .',%, e,
- ,s
.
c , . , e
..
m.,,,,.* ,
i ,
-
i !
s
,
'
PillLADELPillA El.ECTRIC COMPANY Peach 19attom Atomic Power Station
. Hotra, Ponnsylvania 17314 Deccaber 10, 1979 0
0 D Mr. no yce H. Grier Office of Inspection and P.nforcement ' '
u
.c j uegion'1 United States Nuclear Regulatory Coeusission n[} D g- -
'. 3
,
A l
'
631 Park Avenue +.. yU _S,.I -a: .
-.ag(! 7,i,4
. .
- King of Prussia, PA 19406 '
-
!
l
' s*
'
SUBJECT:
REPORTABl.H OCCURRENCE - PROMPT NOTIFICATION con fi nei n t 4 s. Plot schmann's conversation with Mr. Creanman Rogion I, United Status Nuctuur ltogulatory Commission on Decumber 7,1979.
,
Refer ince: pocket No. 50-277 l Pench Rottom Unit 2
! Tuchnical Spucification Hoforeneus: 6.9.2.u(2), 3.7.D.3 l
l Heport No. 2-79-53/ IP l
.
Occurrence Dato: 12/7/79 Identification of Occurrence: " .m Unit 2 r-circulation system sample line outor valve isolation function inoperable.
Appa ren t Cause of occurrenco:
Improper testing following installation of a jumper.
l l Analysis of Occurrence:
'
1 A jumper was installed in the control circuit on 5/20/79 during an investigation of the inability of the Unit 2 recirculation system sample isolation valve A0-2-2-40 to open in response to a manual signal following a modification to assure electrical separation. Because the jumper restored manual eperat ton and because the individual doing the work be11oved that the
.tumper only restored :ircuit continuity, no testing of the isolation cep-hility of the valve was done. The juusper was desir logged in the jissper tog per procedure. On 12/7/79, during preparation for testEng
'
of another modification this jumper was recognized to inhibit automatic isolation of that waive. However, the inner isolation valve was not affected and would have automatically isolated upon roquest. Becauso
- the innor isolation rutvo would have isolated and the outer isolation valvo could be operated manually, the line could have been isolated if necessary.
Corrective Aetion: A -
(
.
The jtamper was removed upon discovery. Both valve 6 were tested for 4
-
manual and automatic isolation and were found to I a ftally operable.
Am imunediate review was made of jumper los entrie- concoming RP5, p
ECCS, and PCIS circuitry and no abnormalities wet e found. A roview a.m4. twq4e. m .7.h w .,. 7012190' .a .34ss
-
x . h,
.
..
.. -
.<.3.
$ ( g ~/61
-
. .
,
/
.
-
., . + ,
, .. .%. .m .
~
I _ . , _
,, f* l--*' M ..., . > . ., r s :~~.K
.'.*W e ?,l. E
.,; . .a .n d*w. ,. gli .~^'_ . g' Q.-~,.w' - *- u't ' a'r .'E
.n K. y y . . .'.* M.*f..Q . .s, i ~'.r.-~ .
r ,. . s ,, . ,,y
.
,
'" W ' M.= ~ ". ' -A .y : . <-
. - - _ __
.
. ..
.s. . - - + ; ;a.- - w
, . .
9
.
~-
.,
., a
., ; a, . ,,
.
,
ymy.. m,. ~.u
. .
.- ;y v . ,r~.
- .
rMv*+~~y ~' ~ ~e. W P:* *
.
'
2-of the jmsper tog procedure wt11 be made to determine Lf revision is nece as.4ry .
.. r . . ., i .
. . _.. .
. ;..
Imme Very truly yours,
.
1 .c s -, . . , .g
.
..** .WQ 9 Q?{l%>y[*g!f-9., ' ,;
'
.; ': .*'. f Q ,'pgl,. . ' ,i g
-
.
.
- + . ],. y. .T e. .. -
_
-
. 1, , o s .
, z~3 y. . t ., y ;4, , . ,...< pg, y9,,e ; . .<
-
.s :. , y, y, ggg,g,g .- '> : . . . . w. p, g. ., 3
,
, , , . . . . . . .g..
. . " i ,. ,.-:
- -
,'y - ' " ' * ' 5tation Superintendent -' -
.
.
.
.
.-
i Fnl/RSF:jlw
-
,
.
'
-
-
.* . , , , , - ,
,* .~ ..
l .,...e,. <
a . , . . .,
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- M.g . ' % - - = * * -
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' .!
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