ML20090L804

Informs That Preliminary Study Completed of Plant Containment Leakage Testing Program,In Response to NRC 750805 Request.Summary of Comparison of Existing Program to Requirements of App J Presented in Table 1

ML20090L804
Person / Time
Site:	Monticello
Issue date:	09/19/1975
From:	Mayer L NORTHERN STATES POWER CO.
To:	Goller K Office of Nuclear Reactor Regulation
References
10142, NUDOCS 9102120686
Download: ML20090L804 (15)

Text

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NORTHERN 5 TATE 5 POWER COMPANY uis~u Apou s. uewus eorA es4ot

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-N September 19, 1975 lC l,j?

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NPgNS/Sybb SD,2 75 -

E 4e Mr Karl R Goller o.

s Assistant Director for Q,w*l@h, y 4r O

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Operating Reactors Division of Reactor Licensing

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/f U S Nuclear Regulatory Commission go Was):ington, DC 20555

Dear Mr Goller:

MONTICELLO NUCLEAR GENERATING PIANT Docket No. 50-263 License No. DPR-22 Monticello Compliance with the Requirements of 10CFR 50 Appendix J In your letter of August 5,1975 you requested us to determine if containment leakage testing at the Monticello Nuclear Generating Plant confoms to 10CFR50, Appendix J.

We were asked to identify any design features that do not permit con-formance with the requirements of Appendix J or any existing Technical Specifications

'ich are less restrictive than Appendix J.

In the event Monticello is not in full compliance with Appendix J, we were asked to identify planned actions and our schedule to attain confomance to the Regulation.

A preliminary study has been completed of the Monticello containment leakage test-ing program. A stu:: mary of a comparison of the existing program to the requirements of Appendix J is presented in Table 1.

A number of deviations from Appendix J arise because of conflicts between the present Monticello Technical Specifications and the Regulation. The major deviation, however, involves a small number of con-tainment isolation valves which may be construed to required periodic Type C tests, but have design features which preclude such tests. As noted in Table 1, departures from Appendix J include:

a.

Table 1, Item 1 - A conflict with the Technical Specifications exists in the retesting required after a Type A test failure.

b.

Table 1, Item 4 - Appendix J requires all fluid systems which are or may be open to the containment atmosphere following an accident to be drained and vented during Type A tests except for systems required to keep the plant in a safe condition and systems which are normally filled with water and in operation under post-accident conditions. During testing at Monticello, i

all required systems are drained and vented with the exception of:

10 ' V' "

9102120606 750919 PDR ADOCK 05000263 p

PDR

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NORTHERN CTATEO POWER COMPANY i

l Mr Karl R*Goller l

Page 2 l

Septen.be r 19, 1975 1

1.

The CRD return line is not drained and vented.

Lower-

}

ing the water in the reactor vessel to expose this i

penetration would place the plant in an unsafe condit ton, j

All other vessel nozzles associated with fluid systems j

i penetrating containment are expoced. One of the two check i

valves serving as containment isolation valves in the CRD l

return line is not testable, however.

i 2.

The Reactor Building Closed Cooling Water System serving j

the drywell coolers is left in service during the Type A test as permitted by Appendix J.

The drywell isolation valves are not testable, however.

I c.

Table 1, Items 5, 11, and 18 - A conflict with the Technical Specifica-tions exists in the frequency for conducting Type A tests. Under i

certain circumstances, the frequency required by the Technical l

Specifications is less restrictive than that required by Appendix J.

d.

Table 1, Item 13 - A conflict with the Technical Specifications i

exists in the permissible test pressure for air lock leakage tests.

I The Tecianical Specifications pennit this testing to be acccanplished l-at 10 psig, Table 1, Item 15 - Penetrations which may be construed as being e.

1 subject to Type C tests in ~accordance'~with Section II.H of Appendix J are not testable. A list of all Monticello containment penetrations j

and the testing required by Appendix J is included in Table 2.

Valves which cannot be tested due to system design features include:

l 1.

Instrument air isolation contro1' valve l

2.

Cooling water supply check valve 3.

Cooling water return isolation valve i

l 4.

TIP ball valves (3) 5.

TIP purge supply isolation valves

6. - CRD hydraulic return inboard check valve 7.

Standby liquid control inboard check valve i

8.

Torus spray isolation valves (6)

Differences in interpretation of Section II.H of Appendix J could l

affect this list, however.

j f.

Table 1, Item 16 - A conflict with the Technical Specifications exists in the test pressure used in Type C tests of main steam j

isolation valves.

i l'

NORTHERN GTATED POWER COMPANY Fk Karl R.Goller Page 3 September 19, 1975 To fully conferm to Appendix J will require a number of Technical Specification changes, possible design changes involving provisions for tcsting containment isolation valves, and possible requests for exemption from the requirem'nts of Appendix J.

The following actions and schedule to attain conformance to the Regulation are planned:

a.

A License Amendment Request will be submitted prior to December 31, 1975 to revise the Monticello Technical Specifi-cations to conform to Appendix J in those areas where plant design permits. Technical Specifications which have been recently issued to new BWR's and which conform to Appendix J will be used as a guide in preparing the change request.

b.

Systems containing containment isolation valves which may require Type C tests in accordance with the definition con-tained in Section II.H of Appendix J will be analyzed in detail and appropriate design changes will be initiated or a request for exemption from the requirements of Appendix J will be submitted to the commission in conformance with the provisions of 10CFR50.12.

If design changes are required as a result of these analyses, modifications will be accomplished in ec.;formance with the provisions of 10CFR50.109.

The results of these detailed analyses will be submitted to the Commission by Ebrch 31, 1976 and will include a schedule for completion of modifications that are deemed necessary. Requests for exemption from the requirements of Appendix J will also be submitted by March 31, 1976 in caces where they are deemed appropriate.

The Monticello containmee leakage testing program is now conducted in accordance with the Technical Specifications.

This testing program includes all of the essential features of Appendix J and provides a high degree of assurance that the Monticello containment system will perform as required in the event of an accident.

Yours very tivly,

0. 9q L 0 Fbyer, PE Manager of Nucicar Support Services LOM/DMM/ak ec: J G Keppler G Charnoff Minnesota Pollution Control Agency Attn: J W Ferman Attachments

INge 1 of 10 i

Table 1 10CFR50 Appendix J Pequirements i

Item Appendix J Compliance No.

Se ' lon No.

Pequirement Yes

!b

&nm rks 1

III. A.1 (a)

A. rype A int-1.PNfMt mNs#*"Wfe.

X Procadures are in full compliance with III. A.1 (a)

Z, U '*ge",*,",,' M 7 m'*",'," -

with the exception that Technical Specification t

totne r:.__.a errrpomimeta pur'es 4.7. A.2 (c) states that ir leak repairs are needed two perwa betwo tne senteue er the co -

t.inms t nes,eetie d e. perform.ne. er ta meet the allova, ole operational leak rnte, tM

• • TP' * *",'; ",3,Q',,",, **_2""'""l.'"

Type A test need not be repeated pmvided Type B r

be tested in se esese to the ee le eendiume and Type C tests, when used to adjust the initial es preeuces_ purtrw me permd be=sen sne tempwm erenew A wet med meintu Type A test result, yield an acceptable leak y uen er m. eentern wet instweswa rer th*

rute.

eubseIweet "I?pe A test. repetro er ed}ust-enente shatt be mede to _.... t whose t

neekage escende that spoetSed gn the technte=I spectScotaan me once as preettent arter toon-stSatape. If durtrig a Type A test. Becluding j

the suppasmontal test spe**Ded to IIIA3 (bl, potenuany succestie temesse pathe are 3 den-j tISed whtch wsII interfere wttts settefectory cesopletsoa er the test,er whleh result to the Type A teet not rseetnas the -,

r erl.

terts III.A 4.(b) er IIIA 8 (b), the *ITre A test l

shall be terminated and the W through l

esta pathe enmit be mees-md metag seena l

is.ne.e teaung metmoda n,p. ire d=

4 edtsstoweim to equipement chain te monde end i

a "!?pe A test,.. _ 1 "Ibo cas"reetise ee-

^

twi temen and me onnee in % rete determined noen the teste and esermaa tote.

gented leakego deteresteed fWorn the lonel leek and Type A testo shall be inelsdad In the report eebeestted to the cornensesen as spe-l e18 edin Y.3.

l 1

l l

1 i

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I

Page 3 of 10

'Iable 1 10CFH50 Appendix J Eequir nents (contti)

Item Appendix J Co:::pliance I6.

Section Ib.

Fequiremnt Yes Ib Iie:-n rks X

The ?m A test fraquency contaimd in Technical 5

III.A.2 2 c -.,,

re,,,, % ti iiestace Spectrication h.7 A.2 (d) is in conflict with rusa t== ** *'tb

• =* *' a s s*** *"-

euro..nen no _" c a.

.t tne amaresie the frequency stated in Section III.D of Append 1x e,ecia.e = n13.

J.

6 III. A.3 (a)

' s. rese e.ormed,. <e: An Type A *=m ehan X

"he test prvcedure fully coc: plies with A*CI

b. come. ewe in m e wita tw proes-IAS.k-1972.

emne oc tne Am ra.n n.t,oma etaneare nu +-inz. --,o nate wouns or co -

tainanent structures for Mwcamer Meectore.

March 161972_a Tbo spethod eboept for the l

laataan test shall normany be taead for the pertedte tests.

I rue supplemental test specified in Appendix c or 7

III.A.3 (b)

swo secor.cr r nor Type A test enaa be eartned 67 a ~. ; ;-.tal teet. As wept.

Afy{ f$},k=1972 is Conducted.

maae n.uma to esserinse in Appe.dne c or Aust no e-ista. The==ppiemontaa wet Emethod senseted obau be condweted for suf5-cient durstaan to estattish ecourstofy the change in tense rate betworn the Type A and suppletnental teet, Resulte Troen thls supplementag teet are w/ ' preended St t $1Serence between the suppleveental test dann and the Type A test data se wtthtm OJS La ter Oss Lat.11 roeurts are met within eJs la for OJS Lt). the reeman sha2l be deter-mhed correcties actton taken, and a sue-eenerun __ x ; tar w.t perfora a.

I 1

te: w et sen=mee r ase b n me enac=2a w a x

Icakage rates are calculated using the reference 8

III. A.3 (c)

,7,,,,*,,',",,*'"'*""*""**"*'*'8""-

vessel method specified in Section 7.10 of AIGI IAS.h-1972.

l I

Page 5 or 10 Table 1 10CFR50 Appendlx J Fequin:ents (contd) 3 Item Appendix J Coc:pliance No.

Section No..

Requirement Yes No Bemarks 4

4 e addess or %ere.e.re.... u."7 X

Technical Specification 4.7.A.2 (d) is current 17 11 III.A.6 periodie type a test f.n. to meet sm..,pa.

in conflict with Section III.A.6.

"Ihis specification e.w.ceeptance criten. to ma s op. ee

' *Q"" *FP"***,'* 'Q"'

• provides an altemate accelersted testing schedule in c_

the event of a 4 pe A test failure, o, u t co euose r.rieda Type 4 teste fast to meet the appetab6. nee ptance erwrm := m.as<=i.

e stnotandme 13.

pertode veteet eebodule r* MD. e Type A test eben be r:a at enen plant enut-dews for refwettog er appronianately esery is months. obtenecer occure Brot. untal two consaeutive Type A tease meet the acceptance erwria in mas (>>. aner n.en uma the retest schedule eyectSed la IUR. may tw e, umed.

12 IIL B.1

a. r,,e e ce,e,.

X All penetrations Ject to Type B tests,

s. rete wesode. acceptabte aw.oo of p*'-

as defined in Section II.G of Append 1x J, reem w a, _. _

-s and persedic w stretainenude:

are tested. " die testirsa; method coc: plies i.: x-*.tum by b.a.de senses-'

with Section TTT B.l.(b).

.,etacd ser e einee. qui w.t test m tmodo r

much as names oportrobeeter) et a test ebee ber. Pressertmed #ttB #Ar. BI%feW.S. er pB8#*

j t

snatne Suld spectSed in the tacksteal i

spectacassees er sesoetated besos and con-structed,se part of ladiendant contatsment

{hh

_..t MN N

1een of tame test eh===ber of the con ***mt penetratase presourtmed with ear. nitrosen.

er....

-*- esse specteed to the toekanest spectScataone er _ ^ ^ ^ beams.

(e) T==h*Te servoulanee by===== es a permamentay asessned system with Petesame for coattemous er fatersmittent posseertention of Stadleldest er groups of costalossent pree-trotsons and _. _ -

t of roto of pree-oure lose of air. mfasesse. er pneuematae Sund spectSed to the - apar*arat8on er heems thrwegh time leak paths.

- ~.

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i Pare 7 of 10 Table 1 10CFR50 Appandix J Fequinrnt (contd)

Ite:2 Appendix J Cor:pliance No.

Section No.

Fequircrrnt Yes I;o Fe:Itrks 16 III.C.2 reet pr.ee.n. t.

v e. w = pe X

Technical Cpacification L.7. A.2.f (2) ( c) pan:its Z,,",,,,,,"j [.f'.,***'* "_PM c:ain steva isolation valves to be tested at 25 psig.

.= w.ruwe.. p=e r. w n All other P pa C tests are conducted at Pa.

f im v.:=. wete er. w.i.e wum nois fret.. es.1 ryster. oh.It b. r _ _ -M vfth th.t Suld to e prese r. act l.e tb.a 1.10 P.,

3 AWaw'r erffsw. W emeined X

Technical Specification h.7. A.2 ( f) states the 17 III.C.3 mm w rar.a -

_. w.na se o or et t. Typ. s a=o t onen b. 3es, acceptance criteria for Monticello Type B and

'j,",,',,,s,.

e Type C tests. This cri.teria is currantly more fee. - seveneeso,

ees.e-e vs.n conservative than the criterion or Cection III.C.3 ee.orm i., en. comwi e i-.m.p.

=te :

rwrw v.vn s:

,. e.es ie.e w m

5 ee wwer.i.e to h flut$ 3 k F.te. th.t de sket.s.

eve 4 tae.o.pectn.a i sn. t.c.,.te.

.p.et.

o Sc.ticme er eoet.ted b.mee..pd (b) Th. inst.Had 1 sus.tten v.S c.

en.1.,

e. tor eve *ent Bis?$ 2:rvoetrsry as sufSeteers to

.www. th. es.2tng Tweetles 1*Jr et to.st 30 d.y..t. preneur, d 1.11 P.,

• **d"

"*d

• • .* * -1.

rrpe d X

Technical Cpacification L.7.A.2 (d) is curre.tly in 18 III.D.1 fret

(.) After th. peersper.tsee.I le.t.g.

conflict with Cection III.D.l.

' Ibis spacification row s.ete.

e.t at tare.Tyy. A wets am.n e.

Q i '.,'e,tn.n m. oo e.eud wtwn <>." p -M F j,T

• provides a different schadale for Type A tests.

i.ee of e pl.nt is.c atdown for the 19-ye.r pt.at 1.-

sorrice ;.c4G^.r.r (D) 7., _^.- Tie. pertede fisr testing. "Ib.

pe.foer one of Typ. A tests ab.119. Inntt.4 to p rtnd. whost th. 34 3% f.e121ty te n.e.

cr r.tnen.a ' and s= eve e en th. shutenwa eevHtitlen umI.r the.6tataistrativ. L'estPst

.nd in.ecote.ne. with th. esfoty y d.ffnuw3 in th.11e.vuse l

l l

1 1

Pye 9 of 10-m Teble 1 10CFR50 Appendix J Eequiremnts (contd)

Item Appendix J Cocpliance No.

Gection N.

Requirmnt Yes Ib Fiernrks 22 IV.B

s. af=stlere as===eo w er eth X

Secondary contain=ent testirg requimments are jj,",,,,,,,,";,$,7,1t,o,7,9,,

ctatM in Technical Epecification 3/h.7.C.

c evi,.w -s eente.---et amma se een-jected to Type A teste to verify that h Isak-ese rees emmete the ewintremoets of this ap-pendas. Other strisetmous of snuttp tsarrier ear substamespherie aww.to se g. ame-endary

^

z sur boutng water omme-i ture end ektsid binGdtage for,

M y

weemr reactose that enesome et, estame premory l

j runster centainateet er pwtaams thmount) shaQ b) adjee9 te tBSTM el M MeAEWd-emos wif4 tho' r _ T u W SB h techeimmt spen er asumehment tesER.

j l

i 23 V.A A. W fespoettse. A pseeret Sn.

X

v. L _ _. _.we n._ er Tmere spoetson of the eneemmstee interter and emie-rser owfeces of the aestalistment streetwee I

med

_, - _ts sha21 be performed yrte to auf Type A test to enegew any evHleries of either the _ J c ^= whset emor eSect structuret 2

._: strwegeret tatsgrity I

er Seek-ttgtte-R tSere is soldness of j

str9meturut _ n, _ ^_*- ' type A testo =hmM i

met be performed until em settee le tahma to -

sth repaar,. _ :_ -

z.--- n end tasas as myseHled te ttne,, ^

"o endo eyW to 5 % 884 et the saaneurecosteet er w*

t Wust. Doch structurel esterteretnam med cor-i semetee settene manuse chan te sepert-E es l

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NRC DISTRIBUTION FOR PART 50 DOCKET MATERIAL (TEMPOR ARY FORM)

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8-5-75Hquesting NSP to determine Table 1 10CFR$0 Appendix J Requirements Lt r out if containment leakage testing at the Table 2 Honticello containment Penetrations Monticello Nuclear Generating Plant conforms t o 10CFR$0, Appendix J.......

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