ML18058A380: Difference between revisions
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. Liii NUMeElll.Cll llll'OllT DATE 171 . OTHlll 'ACILITIU llrVOLVIO Ill' | . Liii NUMeElll.Cll llll'OllT DATE 171 . OTHlll 'ACILITIU llrVOLVIO Ill' | ||
*YEAR f{ISl~~~:~~AL f:;}: : . : MONTH DAY *YEAR ~AClLITY .. AMU OOCKIT NUMalRlll N/A 01&1010101 I I oh 19 9 1 9l 1 - I 0 11 14 | *YEAR f{ISl~~~:~~AL f:;}: : . : MONTH DAY *YEAR ~AClLITY .. AMU OOCKIT NUMalRlll N/A 01&1010101 I I oh 19 9 1 9l 1 - I 0 11 14 | ||
- ol3 0 14 214 91 2 N/A 01S1010101 I I ITTEO l'UllSUANT TO THI lllQUllllMINTI O' 10 Cfll §: /etr.d - or,,,_ of 1M fol-..,J 1111 | - ol3 0 14 214 91 2 N/A 01S1010101 I I ITTEO l'UllSUANT TO THI lllQUllllMINTI O' 10 Cfll §: /etr.d - or,,,_ of 1M fol-..,J 1111 Ol'lllATllllG 1--llOO-* -*.-II-I-~~--< 21Ull21111 | ||
-- 20.<IOlllol I0.71lo!llJlll*I .__ 1u1i.1 POWlll ,. | |||
Ol'lllATllllG 1--llOO-* -*.-II-I-~~--< 21Ull21111 | * ao.*c.1111111 IO.JllolCll ID.714111JIM 71.71111 LIVIL i...... | ||
-- 20.<IOlllol I0.71lo!llJlll*I .__ 1u1i.1 | |||
POWlll ,. | |||
* ao.*c.1111111 IO.JllolCll ID.714111JIM 71.71111 | |||
LIVIL i...... | |||
1101 or o 1o ao.*c.11111w1 I0.*101121 . I0.711811211 .. 1 ...._ OTHlll /$/#e/f'>; ;,, Ab<OWr 1#1-.11111 /ff Text, NRC ,,.,.,,, | 1101 or o 1o ao.*c.11111w1 I0.*101121 . I0.711811211 .. 1 ...._ OTHlll /$/#e/f'>; ;,, Ab<OWr 1#1-.11111 /ff Text, NRC ,,.,.,,, | ||
~ | ~ | ||
I0.7Jlall21111 | I0.7Jlall21111 | ||
Line 69: | Line 62: | ||
LX. I0.7JC.llJIUUI 111.n1a11211.1 LICINIH CONTACT fOll THll Liii 1121 T LEPHONE NUMBER ARIA CODI Will~am L. Roberts, Staff Licen~ing Engineer | LX. I0.7JC.llJIUUI 111.n1a11211.1 LICINIH CONTACT fOll THll Liii 1121 T LEPHONE NUMBER ARIA CODI Will~am L. Roberts, Staff Licen~ing Engineer | ||
~LITI ONI .LINE fOR IACH COMPONENT fAILUlll OllClllllO IN THll. lllJIOflT 1111 CAUH SYSTEM COMl'ONENT* !REPORTABLE::::::::::::::::::-:::::::::::::::::.::::::: CAUSE SYSTEM COMl'ONENT TO NPRDS :::::::: :::::: : | ~LITI ONI .LINE fOR IACH COMPONENT fAILUlll OllClllllO IN THll. lllJIOflT 1111 CAUH SYSTEM COMl'ONENT* !REPORTABLE::::::::::::::::::-:::::::::::::::::.::::::: CAUSE SYSTEM COMl'ONENT TO NPRDS :::::::: :::::: : | ||
:;:::::: ::::::::: : : : )j | :;:::::: ::::::::: : : : )j | ||
: : :*:* : : : ){ )} :r::. | : : :*:* : : : ){ )} :r::. | ||
*'.*'.**=-:*:*:-. :=:=:*:*:-:;;. :::: | *'.*'.**=-:*:*:-. :=:=:*:*:-:;;. :::: | ||
Line 78: | Line 69: | ||
I | I | ||
) > | ) > | ||
} | } | ||
H*'.**.*:*:-:*:* | H*'.**.*:*:-:*:* | ||
O:*:* | O:*:* | ||
Line 86: | Line 75: | ||
t:::*:::::-:-:::.::::.;:-::::-::::::: | t:::*:::::-:-:::.::::.;:-::::-::::::: | ||
::::;.;:::::: .. :-:*:;.:::.:*: | ::::;.;:::::: .. :-:*:;.:::.:*: | ||
I I I I i I *:-:-::::: *:*:**:*:* :::::-::::::::: | I I I I i I *:-:-::::: *:*:**:*:* :::::-::::::::: | ||
I I I I I I I ~.*.* :;;;;:;:;;;:;::*:*; :;.;;:;:: :;:: | I I I I I I I ~.*.* :;;;;:;:;;;:;::*:*; :;.;;:;:: :;:: | ||
"""LIMINTAL RIPORT EXPECTED 11" y. YI IX'ICTl!D | """LIMINTAL RIPORT EXPECTED 11" y. YI IX'ICTl!D n | ||
IUIMISllON OATE 11111 YU (If llW. * - llJ<'IC'TED SVIMISSION. DA TEJ I I | |||
1\81TflACT /Limit ,. l<<IO - | 1\81TflACT /Limit ,. l<<IO - | ||
* I.a.. -x;;,,,,.,y fl,_ li'WI*-* ry_rre,, /in.V 1111 . | * I.a.. -x;;,,,,.,y fl,_ li'WI*-* ry_rre,, /in.V 1111 . | ||
Line 102: | Line 87: | ||
IM31 | IM31 | ||
llllC *** - - | llllC *** - - | ||
*NJ* "I *wC~iA* *1;.;,,.r:)** ==-***Oil | *NJ* "I *wC~iA* *1;.;,,.r:)** ==-***Oil | ||
- .-01110 ~wt *O l'to-4*1).e . - | - .-01110 ~wt *O l'to-4*1).e . - | ||
IO**o **~*,. - | IO**o **~*,. - | ||
OOCUT- llUl91* Ill | |||
~** *~* ** *&QI | ~** *~* ** *&QI | ||
* 11 | * 11 | ||
Line 120: | Line 103: | ||
' concern because the failu~e of the cfrc~it does not lead to: undesirable consequences (i.e. the circuit fails safe). Additional backgrbund and* | ' concern because the failu~e of the cfrc~it does not lead to: undesirable consequences (i.e. the circuit fails safe). Additional backgrbund and* | ||
information on the CCP circuit.and raceway_ enhancement *project was p~ovided to the NRC in our letter dated Septembe~ 4, 1990. * ~ st~t~s update on the proje~t c was provided. i,n -our letter dated March 12, 1991. | information on the CCP circuit.and raceway_ enhancement *project was p~ovided to the NRC in our letter dated Septembe~ 4, 1990. * ~ st~t~s update on the proje~t c was provided. i,n -our letter dated March 12, 1991. | ||
At- the time of th*e disc<?very -~of the 'latest discrepancy *(engineered safeg-uards | At- the time of th*e disc<?very -~of the 'latest discrepancy *(engineered safeg-uards | ||
*roc;>m *cooler.s circuitry Channelization), the plant was shutdown for a refueling | *roc;>m *cooler.s circuitry Channelization), the plant was shutdown for a refueling | ||
-outage.* This event 'is :reportable as _a condition *outsid~ the des-ig!l _oasis of I | -outage.* This event 'is :reportable as _a condition *outsid~ the des-ig!l _oasis of I | ||
- . the pl ant. * * . | - . the pl ant. * * . | ||
. Cause of the Event* | . Cause of the Event* | ||
~he physical separation and-channelization deficiencies that have been _ | ~he physical separation and-channelization deficiencies that have been _ | ||
Line 140: | Line 121: | ||
. . UCINSll . , . AIPOffT ILIA> TIXT CONTINUA. "° | . . UCINSll . , . AIPOffT ILIA> TIXT CONTINUA. "° | ||
_OOC&IT ""'91* Ill ., | _OOC&IT ""'91* Ill ., | ||
.*-Ov10 ~ ... | .*-Ov10 ~ ... | ||
; | ; | ||
l'to-4*00 * | l'to-4*00 * | ||
~ | ~ | ||
~~!!-::1:~ ;-"'.!'..~~ | ~~!!-::1:~ ;-"'.!'..~~ | ||
Line 182: | Line 160: | ||
* 11llC ***ma , | * 11llC ***ma , | ||
*~** "1 *we~~** *IQ ... ~ .. *:i** :~***ooo | *~** "1 *we~~** *IQ ... ~ .. *:i** :~***ooo | ||
.-01110 ~ ... ..0 l'to~*G. | .-01110 ~ ... ..0 l'to~*G. | ||
OOCUT . . . .1*111 ' | OOCUT . . . .1*111 ' | ||
Line 197: | Line 173: | ||
* Related to the-Cir*cuit and Raceway Schedule Enhancement Project," and .a status update was* provide4 in our-March 12, 1991- lett~r. The_actions and their | * Related to the-Cir*cuit and Raceway Schedule Enhancement Project," and .a status update was* provide4 in our-March 12, 1991- lett~r. The_actions and their | ||
.. FUrrent status are listed below: * * | .. FUrrent status are listed below: * * | ||
** .. L * .The* des-i gn *'and n ~ens i ng :basis.: for thannel i zat.i on .and phys i ca i. | ** .. L * .The* des-i gn *'and n ~ens i ng :basis.: for thannel i zat.i on .and phys i ca i. | ||
* *. : separation* of elect.rical circuits has been reconstituted _and * . . . . | * *. : separation* of elect.rical circuits has been reconstituted _and * . . . . | ||
Line 214: | Line 189: | ||
"Electrical Engine_erjng *sep,arat:ion Criter_ia; Prac.tiC:es and*_, ,. - . . ,:. | "Electrical Engine_erjng *sep,arat:ion Criter_ia; Prac.tiC:es and*_, ,. - . . ,:. | ||
Except.ions;''' * . *. * ., * * * .. :: .* .. ; | Except.ions;''' * . *. * ., * * * .. :: .* .. ; | ||
. .' 1**."* . ** : ' *, . ' | . .' 1**."* . ** : ' *, . ' | ||
4~ A p_hysical:;rev1ew of *installed cable: raceways h_as been performed. fo order to identify i.nstallati9i:is *th~t do not -meet. desig.n * . | 4~ A p_hysical:;rev1ew of *installed cable: raceways h_as been performed. fo order to identify i.nstallati9i:is *th~t do not -meet. desig.n * . | ||
>req_ufreinents;_;. * ...-*.*.:._ *,** * * .,*'.* | >req_ufreinents;_;. * ...-*.*.:._ *,** * * .,*'.* | ||
*;~ | *;~ | ||
* 5;.*:~ Design tnforma~ion relative to the cha:~neli:£ation *and phy,sical | * 5;.*:~ Design tnforma~ion relative to the cha:~neli:£ation *and phy,sical | ||
* roµting of electrical circuits and ra~eways will be erihanced._ Thts*- | * roµting of electrical circuits and ra~eways will be erihanced._ Thts*- | ||
Line 226: | Line 199: | ||
*. * | *. * | ||
* comp_l ete *prior to ~eptember 30, 1992. * "..: | * comp_l ete *prior to ~eptember 30, 1992. * "..: | ||
.6. * -Electrical cabie*:sepa-ration and channelization* anonial ies fdentified . | .6. * -Electrical cabie*:sepa-ration and channelization* anonial ies fdentified . | ||
. during our review of physical *raceway installations .will .be | . during our review of physical *raceway installations .will .be | ||
Line 232: | Line 204: | ||
re solution of these i terns *iS. dependent on the number and' type of* . | re solution of these i terns *iS. dependent on the number and' type of* . | ||
. items identified during the revi~w. | . items identified during the revi~w. | ||
llllC *** - - | llllC *** - - | ||
*MJ* .IJ a iiwc~&****1c1.i1o.*'~** .::a.t***Qlil i..JCENSEE -NT -AIPOffr ILIA) TIXT CONTINUA-N * . - 0 .. 10 ~ ... "° l'to..,)*~ | *MJ* .IJ a iiwc~&****1c1.i1o.*'~** .::a.t***Qlil i..JCENSEE -NT -AIPOffr ILIA) TIXT CONTINUA-N * . - 0 .. 10 ~ ... "° l'to..,)*~ | ||
........ l*'l*" | ........ l*'l*" | ||
QOCUT llUMll* Ill * *~ | QOCUT llUMll* Ill * *~ | ||
Line 246: | Line 215: | ||
Electrical Cable and Raceway Separation Issue Resolution Plan is intended to address the root cause of this event and no further corrective actions to | Electrical Cable and Raceway Separation Issue Resolution Plan is intended to address the root cause of this event and no further corrective actions to | ||
* prevent. recurrence are proposed at this time. Remedhl actions for the recently identified specific circuit routings are as follows: | * prevent. recurrence are proposed at this time. Remedhl actions for the recently identified specific circuit routings are as follows: | ||
A.* Since only class IE circuits require physical separation of . . | A.* Since only class IE circuits require physical separation of . . | ||
channelized circuits, the safety classification of each potentially mis-routed circuit will be ~e~iewed. | channelized circuits, the safety classification of each potentially mis-routed circuit will be ~e~iewed. | ||
Line 275: | Line 243: | ||
Cooling Fan V24C . | Cooling Fan V24C . | ||
*temporary modification was performed to remove reliance on V24C;' This . | *temporary modification was performed to remove reliance on V24C;' This . | ||
circuit has been re-routed to provide proper physical separation. | circuit has been re-routed to provide proper physical separation. | ||
S65 Reactor Prcitection 1 *. Yes No Failure of circuit d6e~ not System adversely affect accomplishment.of the safety function. | S65 Reactor Prcitection 1 *. Yes No Failure of circuit d6e~ not System adversely affect accomplishment.of the safety function. | ||
... .1 IP 73 | ... .1 IP 73 | ||
Line 288: | Line 253: | ||
sos Service W~ter System 1 . Yes . No Failure of this c i r*cu it does not Valves adversely affect accomplishment of | sos Service W~ter System 1 . Yes . No Failure of this c i r*cu it does not Valves adversely affect accomplishment of | ||
.. the safety function . | .. the safety function . | ||
G06R Diesel 1-2 Auxiliary 1 *No. No Fail~re of this circuit does not Skid adversely aff~ct accomplishment-of the safety function in short term. | |||
G06R Diesel 1-2 Auxiliary 1 *No. No Fail~re of this circuit does not Skid adversely aff~ct accomplishment-of | |||
the safety function in short term. | |||
(2-4.hours). Long term operator | (2-4.hours). Long term operator | ||
.actions are addressed in *plant | .actions are addressed in *plant proced~re~. Proper physical . | ||
proced~re~. Proper physical . | |||
" separation will be established . | " separation will be established . | ||
Sl6 Crimponent Cooling J . Yes No Failure of this circuit does not Water Valves* adversely affect accomplishment *of the safety *furict ion .. | Sl6 Crimponent Cooling J . Yes No Failure of this circuit does not Water Valves* adversely affect accomplishment *of the safety *furict ion .. | ||
* 1 | * 1 | ||
'[r ..* | '[r ..* | ||
Attachment * '. | Attachment * '. | ||
Line 308: | Line 266: | ||
.. instrumentation is not required to meet the single failure criterion; S21 and Waste System . 19 Yes No Failure of these circuits does not S22 *Containment Iso1ati-0n adversely affect accomplishment of Valves *the S~fety function; however, containment *isolation valve position S25 and Miscellaneous 17 Yes No indication may be lost. This S26 Containment Isolation Regulatory Guide I. 97, Category 1 Valves instrumentation is required to*meet | .. instrumentation is not required to meet the single failure criterion; S21 and Waste System . 19 Yes No Failure of these circuits does not S22 *Containment Iso1ati-0n adversely affect accomplishment of Valves *the S~fety function; however, containment *isolation valve position S25 and Miscellaneous 17 Yes No indication may be lost. This S26 Containment Isolation Regulatory Guide I. 97, Category 1 Valves instrumentation is required to*meet | ||
. . the single failure criterion. The . | . . the single failure criterion. The . | ||
instrumentation was *not upgraded with regards to physical separation when Regulatory Guide 1.. 97 *was imposed by NRC Generic Letter 82-33 . | instrumentation was *not upgraded with regards to physical separation when Regulatory Guide 1.. 97 *was imposed by NRC Generic Letter 82-33 . | ||
. This was due to our failure to . | . This was due to our failure to . | ||
recognize that physical separation criteria were not met. This conditi~n is being evaluated to determine if the circuits should .be | recognize that physical separation criteria were not met. This conditi~n is being evaluated to determine if the circuits should .be reverified to provide proper physical. separation, .or if | ||
* justifita~ion ~xtst~ to request NRC approval of a deviation from the Regulatory Guide 1.97 requirements . | |||
reverified to provide proper physical. separation, .or if * | |||
justifita~ion ~xtst~ to request NRC | |||
approval of a deviation from the | |||
Regulatory Guide 1.97 requirements . | |||
2 | 2 | ||
. . . Attachment .* ., . .*' '. | . . . Attachment .* ., . .*' '. | ||
*' ** LER 91:-014. ,Suppl emetit:. 2 *:: .* *.,* .: ~ . | *' ** LER 91:-014. ,Suppl emetit:. 2 *:: .* *.,* .: ~ . | ||
Line 331: | Line 278: | ||
-and Level * ~ . *~ | -and Level * ~ . *~ | ||
rout_ed through one cable tray. .Both IL37 '. | rout_ed through one cable tray. .Both IL37 '. | ||
*level instruments are identified i.n | *level instruments are identified i.n | ||
;,. | ;,. | ||
I J.' | I J.' | ||
*_the Te~hniial .Specifications .. Th~ | *_the Te~hniial .Specifications .. Th~ | ||
cables will be re-routed to provide | cables will be re-routed to provide | ||
Line 343: | Line 287: | ||
'8131 Engineered Safeguards 2 Yes .. *No* The fan*coolers are left channel but and Room Coolers fans V27A the power c~bles fot the fans ate 8133 and V27C .routed with right channel cables,. | '8131 Engineered Safeguards 2 Yes .. *No* The fan*coolers are left channel but and Room Coolers fans V27A the power c~bles fot the fans ate 8133 and V27C .routed with right channel cables,. | ||
through a control room floor elettrical penetration. Failure ~f | through a control room floor elettrical penetration. Failure ~f | ||
; -these circuits .does not adversely affect the accomplishment of the-* | ; -these circuits .does not adversely affect the accomplishment of the-* | ||
.. safety function as the redundant' - | .. safety function as the redundant' - | ||
coolers cabl~s ,ate routed separat~ly | coolers cabl~s ,ate routed separat~ly | ||
Line 351: | Line 293: | ||
f~om these-circuits. * | f~om these-circuits. * | ||
. *, t | . *, t | ||
. . '* I',* | . . '* I',* | ||
... ~J ' | ... ~J ' | ||
. *'*I | . *'*I | ||
~ | ~ | ||
. '}} | . '}} |
Revision as of 12:17, 3 February 2020
ML18058A380 | |
Person / Time | |
---|---|
Site: | Palisades ![]() |
Issue date: | 04/24/1992 |
From: | Roberts W, Slade G CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
References | |
LER-91-014, LER-91-14, NUDOCS 9205010259 | |
Download: ML18058A380 (9) | |
Text
consumers
~*:,.
Power GB Slade General Manager l'llWERINli MICHlliAN-S l'llOlillESS
. Palisades Nuclear Plant:
- 27780 Blue Star Memorial Hi~hway, Covert. Ml 49043
- April 24 , 1992
- Nuclear Regulatory Commission .
Document Control Desk
- Washington, DC 20555 DOCKET 50-i55 - .LICENSE DPR PALISADES PLANT -
LICENSEE EVENT REPORT 91-014-03, - SAFETY RELATED CIRCUITS ROUTED WITH OPPOSITE CHANNEL CIRCUITS - SUPPLEMENTAL REPORT . .
License~ Event Report (LER) 91-014:03 is .attach~d.
- This event is _reportable to the. NRC per 10CFR50.73(a)(2)(ii), as a condition outside the design
~ ' *-
basis.
The original. LER 91.-014 was dated August 8, 1991, and provided notification.
- that a physi~al separation and channelization d~ficiency existed with* cabling
- associated with three electrical schemes. In that LER we rioted that becaus~
of an ongoing Electrical Cable and Racew.ay Separatibn Issue Res.elution Plan, we exp.ected to. submit additional information on this subject, as we expected that additional deficiencies may be identified. Supplement 1 to LER 91.-014,
.*dated February 14, l992, prov.ided information concerning additional.
- deficienci~s, their stat~s~ and planned resolution. Supplement 2 to LER 91-014 provided information on a cabl~ s~paration and channelization
- deficiency identified with pressurizer level circuitry* cable .. This attached
- supplement provides.informatiorr on one additional cable separation and *
~hannelization.defiGiency associated with the plants redundant*~ngineered safeguards roo~ ~ir coolers. Because programs afe in place to address these*
deficiencies, and have been described in earlier revisions of this LER, no
- major changes have beeh made to .the descriptions in this LER except for the addition of the latest.deficiency to the attachment to the LER. Any changes d 4 ; t ; c a f l i n e in the right.hand margin.
Gerald B Slade General Manager CC Administrator, Region III, USNRC NRC Resident Inspectdr - Palisades
NllCtso:r** U.I. NUCLIAll lllGULATOllY Cm9t1DIC*
~1*
.-ovE:') OMI NO. J110~HM LICENSEE EVENT REPORT (LEA)
'ACILITY NAME 111 IDOCICIT ....all 121 I r*g* llll Palisades Plant o.1s101010121s1s 1 OF OIS
.*.--~ liTrntTr;L**;.-,'!;:-*.........--...~-~-~-~-~..".'".~~----;--...,---;....._--------...,-----...,--......J'-.::.....L:...L..:~;...J..:..J..:...JL.::_~_.1::_~..:...i.::..:..w~~
SAFETY RELATED CIRCUITS ROUTED WITH OPPOSITE CHANNEL CIRCUITS - SUPPLEMENTAL REPORT
. Liii NUMeElll.Cll llll'OllT DATE 171 . OTHlll 'ACILITIU llrVOLVIO Ill'
- YEAR f{ISl~~~:~~AL f:;}: : . : MONTH DAY *YEAR ~AClLITY .. AMU OOCKIT NUMalRlll N/A 01&1010101 I I oh 19 9 1 9l 1 - I 0 11 14
- ol3 0 14 214 91 2 N/A 01S1010101 I I ITTEO l'UllSUANT TO THI lllQUllllMINTI O' 10 Cfll §: /etr.d - or,,,_ of 1M fol-..,J 1111 Ol'lllATllllG 1--llOO-* -*.-II-I-~~--< 21Ull21111
-- 20.<IOlllol I0.71lo!llJlll*I .__ 1u1i.1 POWlll ,.
- ao.*c.1111111 IO.JllolCll ID.714111JIM 71.71111 LIVIL i......
1101 or o 1o ao.*c.11111w1 I0.*101121 . I0.711811211 .. 1 ...._ OTHlll /$/#e/f'>; ;,, Ab<OWr 1#1-.11111 /ff Text, NRC ,,.,.,,,
~
I0.7Jlall21111
- ID.71lo!llJHwlllllAI .U,).
I0.71lo!llJllUI ID.71C.llillw1111191 .
LX. I0.7JC.llJIUUI 111.n1a11211.1 LICINIH CONTACT fOll THll Liii 1121 T LEPHONE NUMBER ARIA CODI Will~am L. Roberts, Staff Licen~ing Engineer
~LITI ONI .LINE fOR IACH COMPONENT fAILUlll OllClllllO IN THll. lllJIOflT 1111 CAUH SYSTEM COMl'ONENT* !REPORTABLE::::::::::::::::::-:::::::::::::::::.::::::: CAUSE SYSTEM COMl'ONENT TO NPRDS :::::::: :::::: :
- :::::::: : : : )j
- : :*:* : : : ){ )} :r::.
- '.*'.**=-:*:*:-. :=:=:*:*:-:;;. ::::
I I I I I I I- :::::-::::::::-,: :::: .;.::::: I I .I I I I I :*;.:.;*:**.*.-.*;*:* ::::
- ' I.
I
) >
}
H*'.**.*:*:-:*:*
O:*:*
.;*:-:-:.:*
t:::*:::::-:-:::.::::.;:-::::-:::::::
- .;
- ::::: .. :-:*:;.:::.:*:
I I I I i I *:-:-::::: *:*:**:*:* :::::-:::::::::
I I I I I I I ~.*.* :;;;;:;:;;;:;::*:*; :;.;;:;:: :;::
"""LIMINTAL RIPORT EXPECTED 11" y. YI IX'ICTl!D n
IUIMISllON OATE 11111 YU (If llW. * - llJ<'IC'TED SVIMISSION. DA TEJ I I
1\81TflACT /Limit ,. l<<IO -
- I.a.. -x;;,,,,.,y fl,_ li'WI*-* ry_rre,, /in.V 1111 .
Through the on-going Palisades Configuration-Control Project a number of apparent discrepancies in circuit routing have been identified. Previ~us NRC correspondence dated September 4, 1990 and March 12,-19_91 provided details of the "Ci~cuit ~nd Raceway Schedule Enhancement Proje~t" and status of the projects .activities. The electrical .circuit channelization and separation deficiencies which have been evaluated at this time, while not conforming to FSAR criteria in all res_pects, have resulted in identification of very few conditi.ons involving a loss of ~lectrical ~r protection system independence; or noncompliance with 10CFRSO, Appendix R requirements". In those few cases compensatory measures and corrective actions have been taken as stipulated in plant Technical Specifications and/or the condition was promptly-correct~d~
The physical separation and channeli~ation deficierici~s that have been identified appear to result from two separate failures: 1) A non-uniform interpretation of design criteria for chann~lizing and routing electrical circuits, and 2) the unavailability of a single, complete .and reliable source of desfgn document*tion for electrical circuit routing and channelization.
At the time of the discovery of the latest discrepancy (engineered safeguards room cooler cfrcuitry channelization}, the plant was shutdown for a refueling outage..
- NflCF--
IM31
llllC *** - -
- NJ* "I *wC~iA* *1;.;,,.r:)** ==-***Oil
- .-01110 ~wt *O l'to-4*1).e . -
IO**o **~*,. -
OOCUT- llUl91* Ill
~** *~* ** *&QI
- 11
- Palisades Plant Op 14 - - oI 3 o 12 oir. o 1s*
"",............ -------All"'.,.."" -
EV~NtDESCRIPTION T_he *Palisades Configuration Control Project (CCP) which was initiat~d in 1987
'included an effort to.veri.fy and correct plant electrical drawings, including the plant circuit and raceway schedule. - This effort involved development of a circuit and raceway schedule data.base, as well as-verification of selected portions.of circuit routings. Through this effort a number of apparent discrepancies in circuit routing have been identified. - This event involves_
approximately *40 circuits wh.ich were bel ie-ved. to be safety-related. cj rcuits routed with opposite channel circuits. Previous plant deviation reports
- involving apparently mls'-routed Circuits include D.-PAL-8~-147, D-PAL-90-40, D-PAL-90-221, and D-PAL-90-222. All of the apparently mis-routed circuits*
from these earlier deviation reports that have been evaluated,. have been dispositi.oned as either notb"eing safety-related and therefore channelized circuit rout~ng .is not an issue, or the cirtuit mis-routing .is nrit a ~afety
' concern because the failu~e of the cfrc~it does not lead to: undesirable consequences (i.e. the circuit fails safe). Additional backgrbund and*
information on the CCP circuit.and raceway_ enhancement *project was p~ovided to the NRC in our letter dated Septembe~ 4, 1990. * ~ st~t~s update on the proje~t c was provided. i,n -our letter dated March 12, 1991.
At- the time of th*e disc<?very -~of the 'latest discrepancy *(engineered safeg-uards
- roc;>m *cooler.s circuitry Channelization), the plant was shutdown for a refueling
-outage.* This event 'is :reportable as _a condition *outsid~ the des-ig!l _oasis of I
- . the pl ant. * * .
. Cause of the Event*
~he physical separation and-channelization deficiencies that have been _
id~ntified appear t~ result from two separate: failures: 1) A: non-uniform interpret~tion of design criteria for channelizing and routing el~ctrical circuits, and 2) the una~ailability of a single, complete and reliable source**
of design docum~ntation for electrical circuit r9Uting and channelization.
Analy~is of the Event .*.. ..
Cable. Separation_ Design Criteria The desig_n criteria wfrich were or-ig.inally used at Palisades to provide - -
physical independence between redundant electrical tircuits were submitted to the Atomi.c Energy Commission (AEC) on May 28, 1969. This submittal contained, in part, our response to a requ~st for information regarding the criteria and_
associated bases used at Palisades during initial design and installation of*
- el~ctrical circuits. The ~uidelines that are currently used during design of electrical cables and rateways are essentially unchanged from those of the "original design period and are r~flected in FSAR Section 8.5.3.1. FSAR Section 8.5.3.1 states that circuits belonging to safety-related power distribution channels, reactor prote~tion system channels, engineered safeguards channels or other _safety-related syste!:ll channels will be run in
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separat~ raceway sy~tems; and that "physical separation; (dist~nce), is considered to ~e most reliable method of providing circuit separation and
- isolatton." ** * *
- In practice, the.design criteria fbiphysical separation and independence of.
electrical circuits are primarily satisfied by* routing electrical cables in chanryelized cable raceways, and by maintaining a separation distance between.
these*channeliz~d raceways .. Thts method of providing physical separatio~
between redundant e_lectrical circuits meets the intent of currently accepted standards and guidelines and has been reviewed and determined tobe
.acceptable. Palisades was designed pri.or to issuance of Regulatory Guide
.* I. 75., "Physical Independence of Electrical Systems," the AEC General Design
- *. Criteria for physical independence of electrical circuits, or.the*asspciated IEEE standards (IEEE 279' IEEE 384) . . ' .
Circuit Separatjon and Channel izatipn Anomalies *>
We have identified several examples where the cha*nnelization of installed .
electrical cables does .not satisfy our original design criteria .. The actual
. *number of electrical cable_ separation and channelizat1on discre,pancies_
. identified so far represents only,_a very small percentage (less. than orie percent) *of the over thirteen thous~nd* electrical cables that we have evaluated~ As a res.ult of these cable routing anomalies, we 'f1ave unde.rtaken a*
- progral!'lmatic effort to identify and resolve those physfr:a1 separation and ..
channelization discrepancies that may exist, and we have.taken steps to
- prevent prcimulgation of iimilar di~crepancies in1he future~ We have also**
taken actions to address the physical separation. *and *channelization * . *
- deficiendes-whicb h.ave been.identified to date. * ..
The electrical circuit chanri~liiation and separat*i*o*n deficiencies which *have been ~valuated at this time, while not cdnforming t6.FSAR criteria in all respects, have resu.lted in identification of very few safety-significant
- conditions involving a loss of electric;al or protection _system independence or
- .noncompliance with. IOCFRSO, Appendix R requirements. *In those few cases. . ..
comp_ensatory measures and corrective actions h'ave been taken as stipulated .in plant*Technical Spec'ifications and/or the condition was promptly c,orrected..
- . Palisades has taken an aggressive pos.ition i.n its response to the identified eleetrical cable routing and channelization discrepancies *through the Electrical .Cable and Raceway Separation* Issue Resolution Plan . . This plan*
- addresses the causal factors for these conditions and proposes actions to prevent reoccurrence. The key provisions of this pl an include:
- I')
publication of clear procedural ,guidance relative to cable routing design .
. criteria, 2} availability of reliable circuit design- information, 3) field
- review of installed raceways, and -4) evaluation and resolution of identified cable routing*and ~hannelization discrepancies. As we have done in the past, we wiJl evaluate confirmed cable routing and separati~n discrepancies for safety-significance and *operability impact when they ~re identified, and*
. compensatory and corrective measures will be. pursued, as necessary ..
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- This _event is being reported under 10CFRSO. 73(a) (2)(1i) as a condition. outside
~the des1gn: basis of.the plant .. :*
Corrective Action* ..
- .. _Corrective. actions a~dressi ng .ci rc.uit channel i ti' -and separation . ta on .
defi-ciencie~ began with _the Electrical Cable and Raceway Separation Issue .
- Resolution Plani *A suimriary anq implementat:ion schedule for these ac;tions was provfded fo our September 4, 1990, "Submittal of. Add,.itfonal informati_on
- Related to the-Cir*cuit and Raceway Schedule Enhancement Project," and .a status update was* provide4 in our-March 12, 1991- lett~r. The_actions and their
.. FUrrent status are listed below: * *
- .. L * .The* des-i gn *'and n ~ens i ng :basis.: for thannel i zat.i on .and phys i ca i.
- *. : separation* of elect.rical circuits has been reconstituted _and * . . . .
- consolidated ,in a single.:dotument,_ the "Electrical S~paration. Desig*n * ..
- ,. C~iteria*~and Licens_i~g ~asis .. ". _* ... * ., . ... * . . *
.< . *.. * .'. ~. * . G~*i d~-~c~ *h~s~ been deve lOped Jn Admi ni strati v~
- Proc~dure ,'9 ~3~, ** . ** * .:** **'.
. . :;, -"Circu.it'. and Raceway Schedule!',~*. for contfol *and entry of _design* . ~ *~ *.::: . . _. -* ...
informat*ion-. in the)~a.~le_,*-~nd: Raceway Schedul_e (c~*sr datab~se . .
. :i.*,. *. . * * .** . , *,:* .*
o' C~ble ~outing.* requ.i ~'~merits and: .practi ~.ei ha~e **peen **_incorpo.rated- *i ntri * .. *.
Engilie~ring.-Guidelines: EM-22-.04~-- Ch'anne_l .Sepa*r~.tion ~- C'able;* * *':
- Routing* Instr_uctions;'" ..EM-:22-03, *"Fire Protection- - Cable *Route .... . ~
- Verification;'" EM-22-06; ."~able Routing - EEQ Requirements;'~ ****: *.
EGAD-PROJ.--:08, "Cable Sizing* Gujd.eline >Amp~city;-" and EGAD'.. PROJ*-03; * **' *' *
"Electrical Engine_erjng *sep,arat:ion Criter_ia; Prac.tiC:es and*_, ,. - . . ,:.
Except.ions; * . *. * ., * * * .. :: .* .. ;
. .' 1**."* . ** : ' *, . '
4~ A p_hysical:;rev1ew of *installed cable: raceways h_as been performed. fo order to identify i.nstallati9i:is *th~t do not -meet. desig.n * .
>req_ufreinents;_;. * ...-*.*.:._ *,** * * .,*'.*
- ~
- 5;.*:~ Design tnforma~ion relative to the cha:~neli:£ation *and phy,sical
- roµting of electrical circuits and ra~eways will be erihanced._ Thts*-
attiori will tnclude validation ~nd.tcimpletion ~f informat.ion * .;:" ..
. . contained. in the .CRS database *and is currently expected to be
- . *
- comp_l ete *prior to ~eptember 30, 1992. * "..:
.6. * -Electrical cabie*:sepa-ration and channelization* anonial ies fdentified .
. during our review of physical *raceway installations .will .be
. evaluated and appropriate_ly dispositioned.. The sc_hedule* for* ,.
re solution of these i terns *iS. dependent on the number and' type of* .
. items identified during the revi~w.
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For the specific circuits in this LER, the Configu~ation Control Project (CCP)
Electrical Cable and Raceway Separation Issue Resolution Plan is intended to address the root cause of this event and no further corrective actions to
- prevent. recurrence are proposed at this time. Remedhl actions for the recently identified specific circuit routings are as follows:
A.* Since only class IE circuits require physical separation of . .
channelized circuits, the safety classification of each potentially mis-routed circuit will be ~e~iewed.
- B. -The in-.plant routing of .each potentially' mis-routed safety-related channeli.zed circuit wilr b~ verified.
- C.
- A further investigation of t~e original plant design basis for.
physical separation of safety-related ~trcuits was completed. Bas~d.*
on the results of this review, the EGAD-PROJ-03, "Electrfcal Engin~ering Separation Criteria, Practices, and exception~," was revised. * * *
- D. Each confirmed circuit channelization def1ciency *will be evaluated with regards to *equipment _opera bi 1ity and 10Cl'R50. 59; 'Appropriate **
compensatory measures and corrective actions as stipulated in.plant .
. . Technical Specifications will also be taken .. A list .of confirmed .
- . circuit channelization deficiencies is p~ovided in. the attachment to
.*this LER. . . . .
E. Physical separation of improperly channelized, safety"'.related circ~its will be established on a sched~le.consistent.wtth the
. safety significance of the deviation. * *
.. If 1t i's determined that' failure of the _improperly channelized, safety-related circuit does not ad~ersely affect ac~omplishment of.a
- . safety function, the circuit may be left as currently routed. Such*
conditions will be clearly documented in the* Circuit and raceway sc~edule~ * * * * *
- F. Confidence in the accuracy *of the.circuit routing data in.the Circuit and Raceway Schedule was evaluated,. and it was determined ,.
that additional verification inspettions are not needed to assure *,
that circuit channelization deficiencies have been identified.
Addition~l fnfo~mation Previous submittals of this lER, dated August 8; 1991, February 14, 1992 and March 10, 1992 have identified information on other.cable separation discrepancies.
Attachment
'I' ... *.
LER 91-014 S~pplement 2 CONFIRMED CIRCUIT CHANNELIZATION AND SEPARATION DEFICIENCIES Scheme Scheme Name NUinber *Operable " Unreviewed
- Co11111elit of .. Safety Circuits Question 8293 Die~el Gener~tor Room 2 . No No When: the erinditicin was discovered a.
Cooling Fan V24C .
- temporary modification was performed to remove reliance on V24C;' This .
circuit has been re-routed to provide proper physical separation.
S65 Reactor Prcitection 1 *. Yes No Failure of circuit d6e~ not System adversely affect accomplishment.of the safety function.
... .1 IP 73
- P~essurizer Narrow .,
No . . Yes When the condition was discovered a Range Pressure . .. temporary modi fi.cati on was performed to discorinect the circuit.
- Proper.
physical separation will be
.. *established .
sos Service W~ter System 1 . Yes . No Failure of this c i r*cu it does not Valves adversely affect accomplishment of
.. the safety function .
G06R Diesel 1-2 Auxiliary 1 *No. No Fail~re of this circuit does not Skid adversely aff~ct accomplishment-of the safety function in short term.
(2-4.hours). Long term operator
.actions are addressed in *plant proced~re~. Proper physical .
" separation will be established .
Sl6 Crimponent Cooling J . Yes No Failure of this circuit does not Water Valves* adversely affect accomplishment *of the safety *furict ion ..
- 1
'[r ..*
Attachment * '.
LER 91-014 Supplement 2 Scheme Scheme Name Numb£!r. Operable Unreviewed C011111ent of Safety ..
Cfrcuits Question 0408 .Control Rooin HVAC 1 Yes . No -failure of thts circuit does not Emergency.Actuation adversely affect accomplishment of the safety function; however, position indication for ventilation system dampers may be lost. This Regulatory Gui de 1. 97, Category 2
.. instrumentation is not required to meet the single failure criterion; S21 and Waste System . 19 Yes No Failure of these circuits does not S22 *Containment Iso1ati-0n adversely affect accomplishment of Valves *the S~fety function; however, containment *isolation valve position S25 and Miscellaneous 17 Yes No indication may be lost. This S26 Containment Isolation Regulatory Guide I. 97, Category 1 Valves instrumentation is required to*meet
. . the single failure criterion. The .
instrumentation was *not upgraded with regards to physical separation when Regulatory Guide 1.. 97 *was imposed by NRC Generic Letter 82-33 .
. This was due to our failure to .
recognize that physical separation criteria were not met. This conditi~n is being evaluated to determine if the circuits should .be reverified to provide proper physical. separation, .or if
- justifita~ion ~xtst~ to request NRC approval of a deviation from the Regulatory Guide 1.97 requirements .
2
. . . Attachment .* ., . .*' '.
- ' ** LER 91:-014. ,Suppl emetit:. 2 *:: .* *.,* .: ~ .
Scheme Scheme Name Number . Operabl~ Unrevi ewed . C011111ent of.** * * , Safety Circuits Question IL34 Pressurizer_'Wide :Range -No : ves*
- Redundant insirumentS have cables
-and Level * ~ . *~
rout_ed through one cable tray. .Both IL37 '.
- level instruments are identified i.n
- ,.
I J.'
- _the Te~hniial .Specifications .. Th~
cables will be re-routed to provide
~eparation ~s f~quired i~: FSAR
- Sect lon 8. 5.. 3. I.
'8131 Engineered Safeguards 2 Yes .. *No* The fan*coolers are left channel but and Room Coolers fans V27A the power c~bles fot the fans ate 8133 and V27C .routed with right channel cables,.
through a control room floor elettrical penetration. Failure ~f
- -these circuits .does not adversely affect the accomplishment of the-*
.. safety function as the redundant' -
coolers cabl~s ,ate routed separat~ly
.. ' *~
f~om these-circuits. *
. *, t
. . '* I',*
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~
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