ML20024B915

Excerpts from Atomic Energy Clearinghouse Newsletter

ML20024B915
Person / Time
Site:	Crane
Issue date:	01/09/1978
From:	Cazalas R AFFILIATION NOT ASSIGNED
To:
References
TASK-03, TASK-3, TASK-GB B&W-4001, NUDOCS 8307110786
Download: ML20024B915 (9)

Text

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ATOMIC ENERGY C,LEARING HOUSE

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'JONGRESSIONAL INFORMATION BUREAU. INC.

7m E a-nasman ouuv Ncws r.cnvict smcc iso 7 fg.[,[

COLORADO B UILDIN G

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WAsnmotors. D. C. 20005 c'n act y. rn Vol. 24 January 9.1976 No. 2r

...............u+

Tuts ve cx 's ISSur............ - -....

unc will hold public hearing on proposed clearance program for some employees in connercial nuclear industry..........Page 1

..).

Pres. Carter and Shah of Iran agreed on nuclear safeguards that trill allcw U.S. to sell 6 to 8 reactors to Iran.

Pres, agreed U.S. will supply fuel and heavy water to i

l Ind i= ' c Ta ra pur re ac t o r.................................... Pa g e 2 l*

Secret file on "possible illicit diversion of eaterial from NUMEC does exist," declassified NRC documents reveal.......Page 2,

Atomic Sciety and Licensing Appeal Board reversed Licensing 6

Board's decision that Midland nuclear plant license would not et eate si uation inconsistent with ancitrust laws......Page 6

Strontiun-90 and cesium-137 levels in milk are due to nuclear

~

weapons fallout, not to nuclear plant releases, NU report..Page 11 Domestic cranium mill output increased about 10 per cent over that of 1976 Bureau of Mines, Dept. of Interior......Page 16 l

NRC's report of Current Events for Power Reactors for the i

period September 1. october 31, 1977........................Page 17 l

l NRC has issued construction permit for Tyrone Energy Park in W i s c o ns in.............................................. Pa g e 2 2 NRC Public Document Room -

Ins pe c t i o ns............... 7............................... P a g e 2 3

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8 Li c e n s ing.................................................. Pa g e 2 B Recent t r3 d us t ry a nnounc eme n t s..................................Pa g e 31 Reporteble occurrence reports for November 1977 (contir.ued)....Page 42 s

i a

NRC UILL 5010 ?t'BLIC FIARINC ON PROPOSED CLIARANCE PROCRAM TCR SOE IMPwYEES IN C0%?.IRCIAL NUCLIAR INDUSTRY. Proposed changes to NRC regulations upgrading its Afeguards program would apply to personnel who have access to or-control over ertain' quantities of special nuclear material (high enriched uranium, plutonium c

M. pag yd uranium-233), or access to protected areas of facilities such as nuclear 423H) a pmer plants end fuel reprocessis, plants.

DEFENDANT'S m,,.,,,,

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EXHi,bt e Th* ce== 2 * ' i== wilt

• P** itie =11P * **' ====*a5

• af Sa"v5dua15 *ad staur$ an i

U. s. DIST. CCURT

,;h matters as:

su S. D. OF N. t (1) The eevantages and disadvantases of alternative programs, such as psy.

cht logical testing administered by licensees under standards established by the Cornission, and alternative safeguards measures not involving investigatJop cr tening of licensee employees.

hhh (2) The extent to which the clearan:e program meets the performance require-s for protecting nuclear power reactors, particularly scvard meeting the pos.

i-i sen

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tulyted threat of internal conspiracy.

L'

.l.,3 g.,

(3) The desirability of applying the rule to university research and train.

s W ing reactors subject to Part 73 (physical protection of plants and v.aterials) of NRC regulations.

(4) Impact of the proposed clearance pecgram on transportation of special *,'

1 nuclear aactrial.

Persons who wish to present oral or written statesents on the proposed clear.

ance program, announced by the URC last March, must submit their r.ame and name of-their organization, if any, to the Secretary of the Co raission, k'ashington, D.C.

20555, by January 27,.

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6-6-6-6 6-6 B307110786 780109 PDR ADOCK 05000289 P

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,$ # v21, 24 - No. 2 - 3 m.17 (1/9/70) s:

to s=ocks, 41: hough rrstricttor.6 on the' enri:hment ei iurtigo uranium for dcnestic use were partially Iticed. All restrictions were to be lif:ed by 1983.

l During the s su 9-conth pericd, l.3 tens of urantum ccer.poveds, in:1udin5 metals end alloys, valued et $2.9 millien and 382 cons of urantum concantrate valued at l

$59.0 mil 11on vere uported.

The value of e2por:ed special nucletr materials, I

principally enriched uraniuss, for the first 10 nocchs was $391 :1111oc.

1 I

t 6-6-6-6 *

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FRC'S RIpORT OF CU?J1ENT EVENTS TCR POWER REACTCRS FOR 77 PERIOD SE?"ESER l-OC C

~-

1977, published Decciaber 1977, is presented below:

C?ERN:CA ERAOR Cs Jae2ary 11. 1977 while the For: Calhoun Station Uni: I was opera:ing, water froco the Refueling water Storage Tank was pumped into the contaisser.:

thrcvgh the c c,n tair=e nt spray header due :s an operator error.

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e During the performance of a quarterly test of the safety injection and contain-j ment spray pumps, the operator noticed an increase in the containment sump level approximately ten minutes after the Icv pressure safety inje::ico purnp had been i*

started.

Appr xt=a:ely 3300 gallens of water. had been puriped to the contai=nent.

About one minute later the ventilstion isolstien actuation signal was received.

this time the operator realised he had failed to follow the surveillance pro-At l

cedures and had lef: the discharge valve of the low head safety injection pu=p open.

l He irrnediately secured the pump.

}

The Reactor Ceolzat Syste:n was checked for leakage and contair.msnt entry was made approximately one hour later.

Inspe*c:1on revealed that a discharge fror the i

containment spray nozzles >=d occurred. A few minutes later power reduction was started.

A second containrent entry was c.ade about en hour later, after containment air samples confir' ed that a full face mask would provide adequate respiratory pro-4 te tien ic: the lev-Is of radioactivity in the building. A detailed inspection revealed no serious deficiencies and no electrical grounds; tha power reduction

}

ves termi=.sted at a power level of 837..

l Although the operator had not followed the procedure end the discharge valve i

was opsn the contain= en: spray header isolation valve (BCV-345) cad the Icv pressure safety injection to containment spray hsader cross-connect valve (ECV-333) should i

hsve prevented the event.

'ihe ele: ric/ pneumatic converter en ECV-345 had failed l

and both red and green. position indicatien lights were on, indiez:ing the valve was I

partially cpen.

Prior to the event the auxiliary B2114:ng Equipment Cperator had

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taken local control of the valve in zu attempt to completely c'ese the valve. After abou: 1/2 inch of ster travel, the operator removed the valve pin and the valve vent back to its previous position as demanded by the valve positioner. The third valve (ECV-335) in the incidant had a leakage problem that had been previously identified but no corrective action had been taken.

4 The powmatic relay on valve ECV-343 was replaced and valve ECV-335 repaired '

l Velve ECV-31.4 and McV-345 are now required to be placad in the test mode prior to-g operating the low preseure safety injection pump or centain Aprzy pump for tasting.

This mode slang with verifiestion of an snrrancistor vill ensure that both of thess valves are in the fully closed position prior to pump operation.

VALVE MA1.Wr10NS I

1.

Primsry System Deprehuria.acion 4

On September 24, 1977 Davis Besse Nuclear Pcver Station Unit No. 1 experienced j

e depressurisation vnen a pressuriser power relief valve failed in the open position.

The Reac:or Coolant System (RCS) pressure was raduced from MS$ peig to 875 psig in i

appros usstely tventy-one (21) minutes. At the beginning of this avant, stesa was

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being bypassed to the condenser sad.the resctor therinal pesar vse st 263 MV, or 9.51.

l Ele: tract:y vas not being. generated., The following syatems culianc:ioned during the transients l

a.

Stears and itedvater Rupture Coa.ral Sy tem (S?RCS).

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I b.

Pressuriser Pilot Actuated Relief valve.

No. 2 5:ssa Generator Aus111ary Tesd Nap Turbir.: Governor.

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of t'.a ::n. 2 L;5:sr M :rc ; Ve l'"t :sd h =s s.:

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• T. *;;-:-te t-ly e.? :-terste !:ttr, Ica hval in thn 1:o. 2 h m J:: trier::: :.! t I;11 M"!'T tilp cb.:1:.g -h2 fisin St: tm S ol:*ic: 41res 6 tc).

1,. 1 :45 - f '.. t. < f:: dr. ri:s: or c:vsed the E5 te::7? r;;ure, prs :ast, W f ;rt.*v-iatt 1*:es t to r ua.,

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ptrer.:e i-u ~ ! ? d t o t*:e rila 6:tst:cd relfsf.tive :.:pcin: (1255 pstg)

-d th: veh, cy:!*d c;t n t :4 :!:t:d nine ti=* s in :tpid 4ve:es si. 3, In s lir.g to close en t h t ='h sp:- eg.

2:.i...t ':le, t he r'.c ter c per et;r cl-:s:-e d th. r: 's st:er livel f

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• se rad wn:. ally t ri p r a d ska s e sc t or c.*stut or., e-tr ae ?!.sr 1;M*/ cle.:ur e (tvo t.. ':: a :: iso the tra rv:et).

!.t :Fis rott.t :!.e ACS ;rus:.ra t.:u #;;tcriestely 2000 T s t:: ::.J de.rt:st ir., wri te the Ort:suriser level 56d reac!st o :: ir.tx t #n initial ris

. e 1 b:>e t 110 tr:6e s. ' Thz XS pics:vre scatinusd te (9:ttata alte to the cpan relief

.. 9 ?: :rd 2;:n : schts 316'.0 p sis t.;;ca.in:::1y 4:arte ci:ran s '.r.to -hz trtesie:c,

• , : n.*:vil In f t:y Testures Inc.12d:r.y. bi;h praspire Tvs:ar) inheiten :.id contsic:::r.t es.

7, /::-w: :!y fi s.t e.1./ c s.: i..9

.'rt t:insi: :t tha r;;;.r e dis n tha ;;as t ::1:ct l.

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.s e m i c :.g *h s ?.03 blev:' rn, be s t.

Naa::r.; ef s he capt 7 :.::s ig:4. O. 1 *e/ t!.

. :.st.ics ci ::::-i ;t.>.a: tacInt::,.'-Ich h:2 iJohs:d

; p.-;t tr..k e.c,:1;. ; y r:: s,

rulcing is tr.r.*dited ; car rart:stics cf the :; urn:h

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.h i,CE a :.:tc.vsd to bles dr.vn threath the open previuriser powar rehti valve

• : d : n v.tish : *c.- ;; a rs dia

ui.g.;ncil ;.ri,.

:y : calf i: se:a sticn pres:u:e

• (t ". s ch* d, et t.: t!:s =d.:u:r.s into the tr.r.sient. TM '3r : uen ! 5: tam 'n the tCi critied P3 ::le:gt ci *:st er ::to the pre ssur* 2er. 'TY s %rre Ar.d the high L. :t vis e r a n}e :: a ::.- rr i r. sis.4,: d pres surizer lavel :o shout 310 a nc nc...N e r

-a.mt ::1isisnt.

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A;;;ce:-a tly tr.f r

• .t r. ntr.stes into the tr27. stent, ths t::e-d:37 sids of the

• . 2 f:* ts Ctrer otor seat dry. About fearttan minates into the :T:rJitn:, the

.:;r:1. rs tetitte! the Icv *.sval sendition ::d fe; d ths; the twxth.;y feed rump

.:6 c,t.<:p s (: :sdu cd irred. ?!anual control of the s;xs11try ite d pwsp was

>t s-d p =d vs:tr hvel r:d:cr:d to the No. 2 5 :::: tetners:er.

t. t ';p niet.3 ly II :-tre. ret.s u:o the.::a.11ent, the or: 4:ers dia: ve: d t!:st N ;;tt e.:the: pessi rehti v lea vsa s tuck op:n. 31c.drvc vit this valv vas

' ;ted br c*::: s t! ble.k valet. : Sus tst inr.tir.g tha sc retor ve s s el dspre s suri-

. t s :.3.

7 e 2C3 ):u t ara :::o. red to r.or:.t1 ::.4 c:oldct.;. Of :ht ry :sss foliceed.

Jht rer.:n for tha a;4rs:.s "hti!-:r4;" af th: 5! d.f n.4 :.s t yet been de:cr=insd.

At w.a ns be irvt t:ist:f os :tv 312d sastral Icese :::.c.ic: tees at te:nt:21 i>esrds, hat n:t'i:15 c:-ric hnve.

I Is-*+rt s-ire. teto the Iti h:4 c,! :ha p.ts s atiast F:Ic: *: tuned it.lisi vtive l

..vt sigd ehst a ":!cas" ralty v.u missing f ace the statrol car:uit. This missir.g i

r:sf s:iald :.or.?. tly ;s evide t "stel-in" circuit hith vc ald hold the nivt cpen

• Id.eut the relay the p:str relief valse i" t1 t's 7 +se.ra d. ;;<d to 2205 rsig.

cy.: led :;tn sad sletto e tch tice the pres surs of t.he F.CS un: above er belcre 2255 p:!g. :".:n - tid sysiteg of the valva etuted t fe tiu a of the pilos vtive stem,

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• 1 SFh ehre :'v:t4 the

~tr : lia! "!vt to s. if-cren.

It s ss d t.:=:rtd that the auxiliary fe sd ;;;:2p did rat so to I.211 J Trid be:ause l.

( " bit 4Lrs" is t*t :. b s te g:ree r.ior.

1 The Tsert:2 :. :s :.a lyzed by *.5 : :355 v :1!0: --d 4t:s :r t ed to vt 5.ithin the l

l f : < :;s ;s t;n. :t r:1, sed (c: a es t td s;;*.:n.ct :"!cn.

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W :n >.it;;;c a :f the '.b:,va roud :::1fus.st!.-e.s, the pl.n: !wncuor.id as distgr.ed l

• *4.l '.tg vat ta pt <t to :ht ht=l:h.ind i s.** :y of the r, et t TJilas.

i, T.%'*:tr 3::1*; ton n!vts

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C s t c 3:c n r.,

f.3 ;.1.

e :he F.o) e, -.<14 r pl. :. a Lyc:

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.' ~*h: s s ~1ve f. ; s ec cita t. ; s ri:

..t if 1 close sit. il. All othet reut;; n:

'*** r, T:t d '.c :p ?. ~ s. !.: r :< :d -c :r:-11.

7 iet(trit!:Nro :. y 6. 1M 7, *u d :. :t. *

• rit t f J * *'

r- (*?i *: fly 2 8 t* 3:f d so

• notd in tot tydr%she =et.*ar.

Tr.vtr'tt t s:3 et t' e ' cross hihre 1 dt:s: d

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7)M_ fkAhnig dNITE/Nn /N 7/EMG CMG % IN I

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W%%Q. ukb Tdt fRL M O I % Q. 7&ls M G E h wh 77 knF FU w u w at uwtbeww asrbef.o mssuem MWL rwer 3)n v w mchlLvwthmr am 7% 'Tumn.

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- r.e 19 (ists;6A re*1urs of the valve to el :c t.s can d by tre 2

..re r ysle tar

...o:'.- nnd I:11tn; to closa dawn to re:ilr:e the ;.c. :re.

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the hydra"11c systen on the valve. te be dritned Jo en to., yeintThis cau vd valve woula not ag.* rate.

Imt the I

fr.spection of the re ulater rev:a cd rhet a Icching cerev on :he retuintor adjusting knob was toesc a j

knob to vibrate to any position.

nd reuld allow the Vith the recuistor 1r.;ro;crly set it vould not close down tc te ulete pressure and

• onld allo *. the 1:ydraalic i

f!nid to drain before the hydranite operator could r 1

unction... similar

... probica was d!* covered on tro other valves, although the maladjustrent was not sufficient to prevent these valves f ron c;er: ting.

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place so that they could not vibrate loosa.All the re:ulators were reset Ti.e cas:ed satis face.ortly foll,cving these adjes trants.'aalatten velves sere

/.a 3.

Off cas syat m Valvos j

At the C: ster creek declose :-r.orati ;

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statica cn Av t-t 27, 1977 the reartor building ventilation tys:su iso!r cc and the r:rr.dty ss triat. snt systen (5GTS) ante =stically ini:iated.

I?.vct:1:stion retaaled ths: as a;;rextr.stely it) h:.rr. a 5:o:fon c:; terce perfernf r.3 hoasekacping duties in the ain ::ccrcl r. sin 4:. dently caused the at:2 etad off ;as (A; ) code switch te r.tve fr:a "ts:!ata and C

tyyssr" :o t'e " iso? ate" pcst: tor..

This resultsd in the off the off saa dra tn valve gotr.g c:~ sed, and sin:e the t.CC vas ot 324 valve and the g:s flav was sto; ped.

in service

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system and inittattor, of the 5 73 occurred atThe isolation of the react:r Fai ding vent gl 1905.

t ere :;ened four r.inu:es later and the 5:75 vss securedThe tro eff srs valves building ventilatten systes was raturned to norrat at.

7.e.wsstor 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />.

s

. The eff ses drain valve did not seal preterly and ves not leak tight.

This condition all:ved the sarecus radieret tvity ithin the iscla:td off :ss sys:ta pipiag to travel up :hres;h the its:k ru,p in the steck base and fill the air space in the venti *.rtion tunnel

hen the radiation level in the r:setor buildtes venttistien dact reach a 1svel cf 17 mr/hr the zor.itors lecated next to this duct 5GTS.

initiered the The safety cencarn associated with this event j

of a subvergente d:se a perssa vould hrve retaivad fro = the tae'ielc:ive is :he ressittlity

ssaeus atmosphere if they were in the tur.nel area.

'+1ch c:r.tains both 'rt shinthe tun el area is proccesed throa3h the radvas

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j thic th :o the stack which is.cnttored. sad absolute filters prirr to 1xhasistias ser. sed to the tunnel tas 26 tr/hr.

The mzxtr.us radt*:Ica :: vel To ;creer.r.31 cxpesuras er rateases to the envir.n tr.:

frem this event.

r.sulted l

ins:allin an ataro to aler:The licensee is ir.ves ti stics :he feasibill:y of l

erations personnel

: :ha c!cruro of the off as valve then the /.CC is out-of-service.

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%* W Metropolitan Edison Company (as of January 1,1979) m_ _ _s S-v.. C_ a,_

Vee Pres +nt _Geneestion R c..

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c-a-J G Hartwin I

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Manage, Manap

Manage, rearean Engenearmg Ge<*racon Operanons Generation Qual.ty n,,,,,,,,

R M Klingaman L L Lawye' G T Teottver I

Supeevisor Electraas and Conte <W Enginee og Supenntendent G E Mw Nucleme Generahon Slatwm l

Three Mise island

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l Supervissw G P Mill *'

Sugwevisor Supervesa w Enginee, n' Sear.on u.ntee.ance Traenweg Lnens ng s

I'enevam Niacica Three MnI@ Island Generaterm R C MWe D M Shnvien R W Zachman J F H mew I

I Umt Supermiendent Unat Supermtendent Umt i Ume 11 J L See8mge' JLM" Uma suteenseiet u

I Terhnscal Sergxwf Supeevisne Superve%,

Unit It Siation Operations Stapon Operahons G A nuMee Nuclese Nuclear M J Ross J R Floyet 1

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Short Supervisoes (Dust Ocensed)

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I Sh ft Foremen Shift Foremen Unie I Umt it u

u Control Room Operators C strtA R<xpen Operators Un. t Un.t,

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!\\TOMIC ENERGY CLEARING l-loust:,

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R CONGRESSIONAL INFORMATION BUREAU INC.

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• ,",',[,78 oan.v News scavict ssNcc iney A 5"p-COLORAD0 0UiLDING

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WASHINGTON, D. C. 20005 8'8mc7 e. rn T

Vol. 24 January 9. 1978 No. 2:

...............IP THIS WEEK 'S ISSUE............ -. -.. -

i j,

tinc will hold public hearing on proposed clearance program for some employees 14 coessercial nuclear industry..........Page 1

j 3.

Pres. Carter and Shah of Iran agreed on nuclear safeguards that vill allou U.S. to sell 6 to 8 reactors to Iran.

Pres, agreed U.S. will supply fuel and heavy water to t

l Ind ia 's Ta ra pur re ac t or.................................... Pa ge 2 l*

Secret file on "possible illicit diversion of material from

.a NUMEC does exist," declassified NRC documents reveal.......Page 2

Atomic Sainty and Licensing Appeal Board reversed Licensing

,6 Board's decision that Midland noclear plant license would 4

not citate situation inconsistent with antitrust laws......Page 6

Strontium-90 and cesium.137 levels in milk are due to nuclear vespons fallout, not to nuclear plant releases, NU report..Page 11 Domestic uranium mill output increased about 10 per cent l

over that of 1976, Bureau of Mines Dept. of Interior......Page 16

l, l

KRC's report of Current Events for Power Reactors for the period September 10ctober 31, 19 7 7........................ Pa g e 17

=l l-NRC has issued construction permit for Tyrone Energy Park in W i s c o ns in.............................................. Pa ge 2 2 i

l NRC Public Document Roon -

Ins pe c t ions............... 7............................... P a g e 2 3 i

?

Licensing..................................................Page 28 8

Recent indus try a nnounc eme n t s..................................Pa g e 31 j

Reportable occurrence reports for November 1977 (contir.ued)....Page 42 NRC UILL SiOLD PUBLIC MEARI'IC ON PROPOSED CLIARANCE PROCRAM TCR 50VE EMp1DYEES IN C WERCIAL NUC15J.R INDUSTRY. Proposed changes to NRC regulations upgrading its 7 kfeguards prcgram would apply to personnel who have access to or control over trtain' quantities of special nuclear material (high enriched uranium, plutonium c

gg 333 41$

nd urantism.233),'or access to protected areas of facilities such as nuclear a

W 23 71) p< uer plants and fuel reprocessit. Plants.

I DEFENDANT'S

,11,,,,,,,,,,,,,,,,,

EXHIBIT na Co.-ission vill specificatly seek coc ent. of individuals and groups on

'l U. S. DIST. COURT su;h matters as:

S. D. OF N. Y.

(1) The advanceses and disadvantages of siternative programs, such as psy.

cht logical testing administered by licensees under standards established by the Commission, and alternative safeguards measures not involving investigatfoti or testing of licenses employees.

hh (2) The extent to which the clearan:e program meets the performance require-s for protecting nuclear power reactors, particularly tcvard meeting the pos-i men l

tulited threat of internal conspiracy.

.hs (3) The desirability of applying the rule to university research and train-sw

• ing reactors subject to Part 73 (physical protection of plants and 3:aterials) of NRC regulations.

(4) Impact of the proposed clearance program on transportation of special nuclear materi.31.

Persons who wish to present oral or written statements on the proposed clear.

ance program, announced by the NRC last March, must submit their nane and name of-thair organization, if any, to the Secretary of the Cownission, k'ashington, D.C.

20$M, by January 27.,

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, h # ' vog. 34 - pu. 2-;y 17 (t/9/70) 4 to stocks, although restricttom on the enri:hment M iureign uranium for dcucatic use vera partially 111ted. All restrgctions were to be lif:ed by 1983.

l l

During the s m 9-oonth pericd, l'3 tens of uranium ccupoucds, including metals end alloys, velued et $2.9 millien and 382 cons of uranium concantrats valued at

{

$59.0 million were n ported. The vali.e of r.por:ed special r.ucleer macerials.

I principally enriched uranitsa, for the first to months was $391 million.

1 I

t 6-6-6-6.

b NRC'S REPORT OF CU?fENT EVENTS TCR POWER REACWRS FOR 37 PERICD SEPTEFBIR 1-O

• ~

1977, published December 19D is presented below:

I I

g OPERATOA ER.RDR l

On January 11, 1977 whale the For: Calhoun scation Unic I was opera:ing, vster from the Refueling Water Storage Tank was pumped into the cootsinnen through the

'* contattoent spray header due to an operator error.

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During the performen:e of a quarterly test of the safety injection and contain-ment spray pumps, the operator noticed an it.crasse in the containmar.t sump level approximately ten minutes af ter the Icw pressore tafety inje:: ion pump had been started.

Apprcximately 3300 gallcas of water. had been pumped to the contat= ment.

About one minute later the ventilation isolation accus: ton signal vaa received.

i At this time the operator realized he had failed to follow the surveillance pro-l tedures and had lef: the discaarse valve of the low head safety injection pump open.

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Es is mediately secured the pump.

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The Reactor Ccolent System was checked for leakage and contair.msnt entry was made approximately one hour later. Inspiction revealed that a discharge from the cor.tainment spray nozzles had occurred. A few minutes latzr power rsduction was

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started.

A second, containment entry was made about en hour later, after containment air samplas confirined that a full face mask would provida adequate respiratory pro-testion for the levels of radioactivity in the building. A detailed inspection revealed no serious deficiencies and no electrical grounds; the power reduction j

was terminated at a power level of 837..

Although the operator had not followed the procedure end the discharge valve j

was open, the contairs.ent spray header isolation valve (BCV-345) and the low pressure safety injection to contaisement spray haader cross-connect valve (RCV-335) should have proyectail the event.

The ele =tric/ pneumatic converter on RCV-345 had failed and both red and green position indication lights vera on, indiez:ing the valve was partially open.

Prior to the event tha auxiliary Building Equipment Operator had l

taken local control of the valve in an attespt to completely close the valve. After i

about 1/2 inch of stera travel, the operator removed the valve pin sad the valve

+

vent back to its previous position as demanded by the valve positioner. The third volve (HCV-335) in the incident had a leakage problem that had been previously identified but no corrective action had been taken.

I l

l The pneumatic relay on valve ECV-345 was replaced and valve ECV-335 repaire,d '

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[

Velve BCV-344 and RCV-3t,5 are now required to be placad in the tast mode prior to-g i

operating the low pressure safety injection pump or contain Aprzy pump for tasting.

I This mode along wich verification of an annuncistor vill ensure that both of these valves are in the fully closed position prior to pump operation.

l VALVE MAL WsIONS I

1.

Primry System Depre s.urir.ation 4

On September 2,1977. Ddvie gesse Nuclear Pcwer Station Unit No. 1 experienced e depressurizatior -wn a pressuriser power relief valve failsd in the open position.

The Reactor Cooln system (RCs) pressure was reduced from 2255 pois to 875 psig in approstmetely tve xf-one (21) minutes. At the beginning of this twent, steam was o e t

beieg hypa6 bed to sne condenser and,the reactor thermal peser was at 263 MW, or 9.51.

I Elettracity *. ras not being.genersted., The following sy4tems cullunc:1oned during the transient:

Steam and Treduater Ruptura Con.ral S[ tam (S?RCS)

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4.

b.

Pressuriser Pilot Actuated ?slief Valve.

c.

No. 2 Steam Centrator Avalliary Fesd hmp Turbint Covernor.

e.

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s 1-9 dt;.

.:t-l.. C. i ms, a n c. ;.. h a "M I u w" -.u,...

> *: *S...

1. f.- h.*

of t'.a

n. 2 L;'- e :sr h ::r.up ' < 1mt ad ::is et t ;- - ic ':9.

20---<--

-M.

• p : tet t-ly o.- r t-rate 1:ts t, lea hval in the 15. :

N u s.* : t r :4r :: p! r f.ll % --3 trJp, c!.:8.r.g a:hs Hsia 5: s ta

• .a s1:*:::: Valves 5 t4).

t v. 1 - e s ' '... -

'< f:r tF s. re s :to r c ca sed t he ACS t e :r;- s -.s r e, t r e r r at t.

F'""%f f e ;. 2 tie r e 1 vil :n r ip.,

it 2 ;/.3 pre *4'.:s i i;. e sd to 1 :e rtlo a:t at:ed relf s f

.t ivs : :;ctr.: G 25$ pstg) 8

-d e tt v elv, cy:1+d c;t n

,.-1 les:d nine tir.a s 5 r apid vcu s si.,, f, s lir.3 t.o close an t h e O h ;;:-:rg.

m. 3':le, t he r%ctcr cp.: ret r c1 ts: e d th. F:!' sat:er !cvel y

. i s... ne rad wn: ally t r a r r a d cha re actor. *utut on, ritme ?f.sr !;d1*/ c1r.:ure (tvo

.e ' = m o the t ra r uze:). At this ;otst :!.e dCS ;ress:.ra ns +;;.rcriestely 2000 v..-

fi!r, ::.J d. rt:u tt, wrile he pre suriser level had reatbsd it; ir.at. n t ittial ris

. r a b st 310 tr:Se s. ' ths XS p u:are cca:ir.atd to < ecst:ta size to the span reltti

..: 1N :rd. ;; i ri sch!< s 16'.0 p sis : ;te:.*:. taly 41. rte citrJu s *.r.to *.hs ars?.siet,

{ ; ;.':vd I.f t:y Testi.res accladtr.3 Mgh prupirs Ivs:er) inhnten : sd coattir.:.:r.t

.... : '. va..

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j. 1 /t:.u :; y ff.46 61 scs.1 k.3.9.rt tunsit.t tha re;; r e d ts: cn ths ;;as t ::::ct

. - e.k. v's

h vi.a e m i e :.g *hs 7. 3 b1M rn, kJ ::. S r a :: r.; :( ' h s t a p re: r

'.:.:: s 13 ; r. u. t.r/ ti.

a..s.ic.cl ::.:-1:v a: tacts 4 ::,. ich h d isolu:d

g. ~et tr.t.k e.o:M ag 7 1: 3, 12 rulcing is,r.y dited ; ss net: sties cf te :;2 inch

...y,

h M t ' 4

.:1.t.sd to blad down thrculk ths'orn previnriser pcur reitti valve

d '! *: ri,U-h *.: *c. ;tu r z d'.n 1741i55 V'it t i prie.ary reals i: sata asicn pres:v:e

• <t *t sab+d, s';.: 3.as ::t:u:ts into 5 t t r.r.s i en t. The 'srstu en = 8 S: tam in the 1

ici e tes,d t s ses.:gy :f weer st o the pressurtrar.

79< t-e rre ar.d the high i : e vs t e r a r.), u a ? c i r. sis e: 4 pressuriser lavel to dr,u-310 a nc nc..het

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e.a.s ;e t. ; >.ts ::na ivit.

.t;ptc <:-a tely tr.f r:t r > nLr.stes into the trsastent, ths vete-d::7 sids of the

• . 2 f:sts Gerstetor w at dry. About fear: tan ainates into ths :strJiant, the 4;,;t'.srs f.etict/. the Ic4 sval credition : d fr: d that the tax 11:4;y feed rusp

-;6 c,,t.<:p g (: :sduced t;rrd. !!sr. val control of the s2xtlitry esd p mp was

.r Tvd pod vs:tr lavel ras:ctsd to the Is. 2 5:2:a Geners:er.

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..* ';p;nter.ely II. t Jet.s tr:0 the.r:a.sient, the ora 14 :s dia: vc d that

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.' e ;rtsveriter ; ss; :ahtf vitra vss stuck opan. 31c.dric vis this va lv: vas

" ;rrd br citsing ;! bir.k valva, thus ts.=tr.ctie:g tha ra rctor vis s el dspressuri-

.t s o i.

.s *C1,su t ara :::sv.ted to r.str.51 ::.3 c:aldv.v. cf ths sys:sn fellcved.

1hs res.:n for th: 6;JrUss "htkf*:r4;* El lh3 EMS E os r.3t 7et Iten dIICrEIr.2d.

Ar w stsive Irvtt:ist:f os :eva 1*d saser:1 luse :ct.ric: lens at ter:str.21 Scstds, hat j

j rat'iss 5:.cciative, t

l Zs-" Histic.s iets the !s!! s34 s,f tha p.u s atitsr psic: w:t;t:ed :r11st valve s.vt sted shst a ":7c.t" talay vu misstr.5 fse:e the central car:vit. D is's ssing

7!sf vnld r.or..stly ;tsvide e "stti-in" circuit.ht

h vc ald hold the vtive open

• htcut the relay the p -ar relief valve s-tst ths ; +se.;

d.c;;ed to 2205 rsig.

l cy: led :;tn sad Ic:4d etch time the pressure of the F.cs sen: above or below 2255 p:!g..".:s -trid sys11 g cf the talva etuted i fr stu : of t's pilot velve stem.

/4

• 1 tm f *elste

  e :i4 the r-tr rzlief a*!vt se..-:'s tran.

It vu dit.:::rtd th2t the auxiliary f*)d ; asp did est go to fall 4;std be:ause ti "bir dtes" in t's turbate g:rteraar.

the istrtis t. s ::aly:ed by *.13 ld55 v :d! : --d de: stet ed to be within the 0 4 ;s ;st:st u :t r:1,.ed fc a es;tJ spr.ti.rt:

ten.

• di: A > vit;;:n :f th *bsva rotad u:1fus.stle.s, the pl.n: functioned ss distgr.ed

• 4.i tre was ra :3::<t to she html h end D.'s;y 9f the stors ti tabha.

2, F. %' usr I::l*: ton W 1v96

> h c: J1;r fie?.6:tr C.

.c 3:c n es, ga ; 4,.g :h, p,,j.g,..%1er.?!. st.

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7

~4ns tM ~*1ve *. :1 c ;c elca t..; a i;

.,t rf i clost sic. :1. All ottet <<.2t; : r.:

r. a;;d *.c :tt. :. g.;tn,.:g ec::.-11.

7 The 11:#t f :* ::e ;.:p 6. 1M f. *ed h :r. *:*.rit zte J *a n !" -:.* rly r a t *-)lr d

.,91* nold in tot r.yde.she seter.*ar.

'e.v::* trit ': s cf t'e *ctrid f 11.rt 1-dt:9:'d t.. g hjJ:. s t t

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se.

, :' 4 b.*:h.s,:.. * -

• ; 33 ;,4.:n ci...:.

fh

&/N. b

.O E in tLACs CMub 6M M&

hM % U kb 7dt fRLMIWL.7).hs INSUME % n W

MmM uwrve Mrurnhw dabMD msrue#

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~ a um am m van.

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.c 19 (Is?/IE) r.-s ture of rhc valve to clito v.ts enaard by L?c i..sts.; and

• 111ng to cinr.a Jevn to tr:nle:e the ;..F.'

r te i ;91. tar i

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This cau vd the hydraulic sys en on the valve to be dritned do ec to a point thet the valve vould not s>p.* rate.

Tr.spection of the regulater tre:aled that a I

Icching screv on :he regulator adjusting knob was loesc and oculd allow the j

knob to vibrate to any position.

vould not close dovn to regulete pressure and vonld allooVith the regulstor 1r.rro i

fluid to drain hefore the hydraulic operstor could funct s.on.the la draalic l

A similar

... probica was discovered on tro other valves, although the mal.idjustrant was not sufficient to prevent these valves fron cper: ting.

All the reculators were reset.:nd the adjupe'c hn *2s varc fockad in place so that they coold not vibra.e loos ;.

ii.e s aalerien velves sere cas:td satis face.ortly foll,cving these adjus trants.

i 3.

Cff cas 5;atem Valvos j

}

At the Cyster Creek dae.lasc ;w.arati ; statica cn av:tet the vaartor building ventilation tysta'a iso!a:ed and the r.:rr.dty gas 27, 1977, triatrint system (SCTS) ente acically int:iated.

~

I*.verti sticr. reytaled thst at a, prest stely lf 50 hr.rt.

c:;!tyce perferr.!r.1 hSasekseping duties in :he sin ::ctrel re.r* 4::idently a 5: orion caused :he av, a.=nc >d off ;as (A0G) mode switch te e.tve fr: a "e s'

typtsr" to the " ids

• ate" pcsttier..

s::a:a and This resultad it. the off 24 va:ne and the off ;es drain valve going c:ased, and sin:e the.*.00 vas r.ot the C2s flav was sto; ped.

in service 37 systsm and initiation of the 3073 occurred atThe isolstion of the react:r Fut:Jin; vent' 1905.

swre :;ened four c.inutes later and the 5C75 vre secured.The svo off ses valves b;ilding ventilar ten syste vas raturned to norral at

~;.e..sctor

. 00 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />.

The off 3es drain valve did not seal prcrarly and vez not leak tight.

This condition all:ved the gavacus radicectivity ithin the isciated off :ss sys:tm piping to travel up :hrou3h the sis:k sump in the steck base and fill the air space in the ventiletion tunr.el.

Thsn the radiation level in the resctor butiding ventilarten dact reached a :svel cf 17 mrihr the ser.itors letated next to this duct SGTS.

intstered the T$e safety csneern associated with this event

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is :he ressittlity of a sub ergence dose a person vould have retaivsd from the radiesc:tve aserus atmosphere if they care in the tur.nel area.

>.e a

tphere in the tunnel area ir proccesed throash the redras:e vantitaticr. sretam,

• tich c:r.tains both r:.shing and absolute filters, prier to 1xhsusti.is j-threnth to the stack which fe renitored.

tar. sed in the tunnel una 26 tr/hr.

The maxir.u rsdistion laval To personnel ex;esuras or releases to the evetr. n ant r.*sulted fram this event.

The 11 censes is investi stics :he feasibilt:y of Installin: an alarm to alert :peratices personnel :: :ha elesure of the off cas valve when the 1.0C is out of service.

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