ML19344B397

Comments on NRC Clarifying TMI Action Plan Requirements & Providing Implementation Schedule.More Organized Design Approach to Requirements Should Be Taken W/Some Flexibility in Final Clarification

ML19344B397
Person / Time
Site:	Rancho Seco
Issue date:	10/09/1980
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
RTR-NUREG-0578, RTR-NUREG-0737, RTR-NUREG-578, RTR-NUREG-737, TASK-2.B.1, TASK-2.B.4, TASK-2.D.1, TASK-2.E.4.1, TASK-2.E.4.2, TASK-2.F.2, TASK-3.D.3.3, TASK-TM TAC-52606, NUDOCS 8010200527
Download: ML19344B397 (4)

Text

{{#Wiki_filter:4 :- g n ; Q. Q', 7-{%fpf 'f '(( ~ M 2 p y,. '*'w p.,, i ' " ~ m ,Q .g -.g. gfd -y y,f.{ + ~ SACRAMENTO MUNICIPAb UTIO1Y otSTRICT C 6201's street, ' Box.15830. Sacramento, califomia 95813 (916) 452-3211; , s x. y s 1 ~" y r: 'I 2 'c' " October 9,1980 x .t ? Director of Nuclear Reactor Regulatiob Attentioni Darrell G..Eisenhut, Director .. Division of i.icensing U. S.' Nuclear Regulatory Commission Washington,-0.C.1'20555 ~ ~ Occket 50-312 Rancho Seco Nuclear Gene' rating St'ation. ~ Unit 1-TMI Action Plan Requirements'

Dear Mr. Eisenhut:

The. Sacramento Municipal Utility, District has reviewed your letter of September ) 15,1930, clarifying requirements and providing a schedule for the implementation of TMI Action. Plan ;itens. :. We have some' serious concerns regarding these require.

ments an.d wish to provide:the' following coninents for your consideration before

'this clarification is finalized.- Ilt': appears that' the requirements lhave not been' coordinated or integrated.with each cther. Each task. is. addressed. individually and its effect on other tasks or systems does not appear to have been considered.1This presents serious sche-duling problems. since in. many instances the design effort'on 'other. tasks must be completed before a givenl task can be' implemented. For' example, many of these iroquirements; result in a modification adding instruments and. controls in the control, room.3 This wi11'probably require a significant. redesign of the. entire ~ - control room with the addition of'a. number of Class.I: panels'. ~ LThisiactivity cannot-be-accomplished =until:a' majority. of_ the TMI. modification' work has been ' .j engineered.: ~.. 3 7 [L _ 2. , )Many 0f these: requirements'significantly increase the^ demand on-Class I power.- 1.supplie~s.1 0ur studies >to:date' indicate that we wiil.have~to add two' additional dieselcpowere,d generators to'our emergency power-supply system. Our.present-6' 7

best estimate 1 for delivery of these diesel: generators is twenty months: after 12

' ?issuancel of a. purchase' order..Since the detailed requirements:for. these units. Nw. . have not been? determined.at this. time, these units will not' be'available for C ? _Minsta11ation' in iless.than '24 to 30 nonths from this date. F .4i a- .L ..p' y, 's' .l e 1 ~ io w n

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k ,;.The magnitude:.ofjthe requirementsihas;forcedfusL to. build an. additional. 3Classilibuilding: adjacent,to.our existing auxiliary ~ building. !fof: the

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.. g^ . cables: mquired.for: the TMI' modifications cand practically all: new. t,19 electrical panels.will; be. located in'thisib' ilding.? Design'and construction - u >, V !ofcthis1 building will be expedited;.however,Hconstruction:isLnot schedJ1ed ' .e N, . to start-untilithe endlof this;yearrand we cannot havejit completed ~until' ~ 3 V

approximately Decembertik1981 H This', I'should mention,zis or.Ja double

?' / shift basis. ' + y., . ;,: w.n.a y- + . - p , oThelDistrictiful.ly endorses; modifications which will!1ead:to~ significant. h , 'improvementshin plant safety. LWe feel that' the ' schedule. requirements in your. 4 letter will lead to lessEthan the desired.results,iand: feel-it to be highly

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. desirable to,take a :nore organizcf and~ thorough design: approach to: the reruire-- .c s ments. ~ We' urge;that;y6u consider soc flexib111ty7 n your final clarification. 1 -Y .Following.are ourispecific connents on' the: individual requirementh organized y' L by. action 1 plan numbsas', corresponding. to those' in your. letter of September 5,- 9' ' 1980.~ gw 4-Q ~ ACTION PLAN NO. REMARKSL a s' .r II.B.1 Present-estimates forf the delivery of Class I valves..to.be-F~-

used in:the reactor. coolant. venti system, are in excesst of eq 111 year.. It istunrealistictto> require installation:of'

these vents by 1-1-82..iSince Rancho Seco Unit 1 is the- '

y ~ District'sfonly thermal generating unit we do not have - y.M

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a?large supply of. spare parts or' the ability to draw from m

1 r1 .' purchases <for other plants.under. construction as a' source for.'such! parts.1 WeurgeTconsiderationbegiventofa- ?: @,\\ - G .scheduletrelaxationO which would' allow these valves to.be he y . installed duringia regular extended' refueling outage'. : 3 'M following valve delivery.1ThisDis-present_1y scheduled for 1 + s ;: + the fall;ofo1982.> These commentsion hardware; availability . 37 'and implementation; schedule.applyLin, general ~to all1hard-6 ~ ~:- ware.. modifications? required by the Jaction: plan. ( n , ~, y -r f i t d;~. IISB.4' hThe' training program forimitigat'ing core ' damage A111s have J. W ? to be modified'.as" additional equipmentIandisystems1are: %g6 'l~ i ns talled."

• The 1requi rement should : clearly speci fyi that _

' ~, 4 E. ' the training program,. and 'not the training of;each indivi = hy? f [ ^, N;M Ldualioperator, be comploted by9the required date.- a m. l Q y. N .g - f' ;g~ la:;4 % j m f . Q.1 h-

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October'9, 1980-

,o 4 t,' j. . x n [.p X TION PLAN:HO. JREMnRKS, f .n.. r_: JII.D.1'- E ~- EThehequired dates for completion of valve testing 4 , v o,.. A O;,m i appeared.to:be' unrealistic; zThe District Lis partici-y pati G in{the EPRI. testing program'andLthe new, require-- 1 c, ment for block valve testing will have an aryet undeter-- -mined effect ont the overall-schedule.> > 'W !I.E.1-7 The' District is participating with. Arkansas. Power and. b iFlorida Power in a. joint effort for the design of a new ~ iClass I initiatefand control 1 system'for the auxiliary feeowater system. This +pgrade wasediscussed with youri . staff. at a meeting.on September 4.11980. The result + . this upgrade will> be an'auxiliar,/ feedwater systea snich J ,1 can be classified as an engineered safety feature; and ' + includelfeatures'to insure natural: circulation, prevent W over cooling, prevent over filling, and result in a sig- , nificant safety improvement at Rancho Seco.' As dis-L.. _ 9^ Lcussed with your staff, hardware cannot be procured;for E

this. improvement until the first quarter of 1982; and we y

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^ wouldL not; anticipate' installation until later that year. 4 h' This: schedule.is consistent 1with the completion of the - n:vy new. building:which will house most of the equipment. A j 'f detailed description of this system will be provided 6 your staff by the middle of this month for conceptual-W . approval. [" '.II.E.4 1 This item.is an example of a requirementithat'for some-reason-coincides with only one.other requirement date. W, A modification to the containment penetrations is.a' ^ ? major undertaking and the District urges Ethat conside-ga; o, ? . ration;be given for an, implementation date coinciding ~ ~ X :' with an extended outage. + - 1 r 9

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.II.E.4;2 1This 1s'a new requirement:and the District feels' that. tany mWificatbns ty the containment isolation signals R,y ' and setpoints will' require significant detailed. analysis. W- ?4 t }E... x : Ide feel the July -l,1981adate;for: implementation of. these . si, modifications ~to be totally unrealistic. y-n.s & v.f. @ Q g s ~IliFil 4 ',$;" ' HTherequiredlimpl'ementationdatieisJagainuniqueinthe-oy %y' ^ listlof dates 11nlyour requirements and the District would G 1 prefer l that'these modifications be~ accomplished during-y gy: - ~ ? y$c. ~ {an extendedLoutage.y The-District is unable to coceent, v:

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tduring; the short period 'of,4 time allowed. for these comments,- 1 g, tand provide realistic datesifor the installation ~of the ~ (M M 2y g

equipment.J 0ur best'information.shows that much of this; i

p7% mf, y, y H Einstrumentation is' unavailable at this' time. ;The District: s y; p. u m. N G ppc;f.&. ' w., 'n.;g.$ Y, ~ _m _ g. ~ a p a , ; p* " M : , y .:y ny,- ,.g

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>0ctober 9,71980 ',j, ~ C ~ ~7 y .g x ~, no 4 a n, J ACTION PUUt N0J ' REMARKS' -? y . 4 ' ' T I I.,. ,m 4 m m 7 F.1L(cont'd.)L requests further time to determine what"instrumenta. _ f ~ J tion'is available and wil! provide' meaningful <fnput W Twhen this information is'available. ~ ' m o-p a 111.F.2- !The District has concluded.: as detailed;in our letter ~ f August 28, 1980, that additional--instrumentation for; 'o z 4 the detection of-inadequate core cooling is not:neces-R. 1sary._ We. feel that existing instrumentation adequatelyJ :- c. -^ setisfies the' intended purposeof_ detecting and respond-u - Eing to inadequate core cooling and we.ob,lectvto;thiss N' ;;* requirement'in its entirety. L- .'),

II.K.3 Item 30 of this plan requests a schedule and outline forY L, ' '

. a small break analysistin compliance with 10 CFR 50.46 iby October 1,1980.'"The. District is currently developing : C .such a program in conjunction with other members of-the! [' - 'B&W owner's group and should_be prepared 1to;subait this progras' by approximately November 11,1980J L s i gy III.D.3.3 At th D time, the. District does not believe the requested 4 s R.J instrumentation for-iodine measurement'is available and, d .W7 .therefore, is unable to provide a date for implementation. i . e woul like to emphasize' the fact that we are,willing to work with you to. W ~ e develop.' dates-for the implementation of requirements which will allow signifi - n . cant improvements to be made to the safety of Rancho Seco, Unit No. l.- If we d o j, E,7 can. provide any additional information, please advise.. q 7., Vy Sincerely yours, a -bM w a t,,. 1 -i Ps ohn J.-Mattimoe f R Assistant General Manager H & ^ .and Chief, Engineer 1 M.- 4 N a

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