ML20148F571

Amend 18 to License DPR-3,modifying Plant Exhaust Air Sys Including Filter Installation for Radioactive Particulate & Iodine Removal

ML20148F571
Person / Time
Site:	Yankee Rowe
Issue date:	11/12/1975
From:	Purple R Office of Nuclear Reactor Regulation
To:
Shared Package
ML20148F568	List: ML20148F564 ML20148F571 ML20148F575 ML20148F580
References
NUDOCS 8011050722
Download: ML20148F571 (10)

Text

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D.

C.

20555 YANKEE ATOMIC ELECTRIC COMPANY (l:l:

DOCKET NO. 50-29

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YANKEE NUCLEAR POWER STATION (YANKEE-RONE)

AMENDMENT TO FACILITY OPERATING LICENSE q;.

Amendment No.18 License No. DPR-3 1.

The Nuclear Regulatory Commission (the Commission) has found that:

A.

The application for amendment by Yankee Atomic Electric Company (the licensce) dated August 13, 1975, as supplemented November 3, 1975, complies with the sts...dards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will operate in cdnformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.

There is reasonable assurance (i) that the activitics authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities I'

will be conducted in compliance with the Commission's regulations; and D.

The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.

2.

Accordingly, the license is amended by a change to the Technical Specifications as indicated in the attachment to this license amendment and Paragraph 3.A. (2) of Facility License No. DPR-3 i

is hereby amended to read as follows:

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-.... i ' - LThe. Technical Specifications contained in Appendix A, .'f.5.'l as revised, are hereby incorporated:in the' license ~ EM 2 The;1icens3e shall operate the facility in accordance switn the. Technical Specifications, as revised by "~ =i, issued changes thereto through Change No.123." . p;;;w, M.. 3

3.. This license amendment is effective as of the date of its issuance.

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' FOR THE NUCLEAR REGULATORY C03NISSION 7 + Orig,inal signed by: Robert A. Purple . Robert A. Purple, Chief " ~ Operating Reactors: Branch#1 Division of Reactor Licensing } .......m

Attachment:

~" Change-No. 123 to the Technical Specifications Date of Issuance: NOV 1 2BM 7:1 q 4 i,. .;f

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I s'. s?@ + =: NITACID4ENT TO LICENSE M4ENDlfENT NO. 18L E....... CIIANGE NO.123 TO THE TECIINICAL SPECIFICATIONS 3Es3 =isi! I2f FACILITY OPERATING LICENSE NO. DPR-3 DOCTIT NO. 50-29

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Reviso Appendix A as follows: Remove pages 209:1, 209:6, 209:5, 209:10, 216:1, 228:3, 228:4 and insert identically numbered pages.

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.L* s q. <* s.. t.-y e"n-*.;. o.*, Oc'. :Q Thu ' aste disp.? sal system rec'o;ves, contains, ndcquately treat s and. I safc:;. di vcz : ef all Trediective wastes.other then' certain sc parat cly nand)ed im: tetiW - rtes Which may cc:c.e frca the secondar: plant. '!he basic processes i usG in tt C.f:itea are: natural decay of radioactive isotcpes, filtration to rer.r e rr. -f th rnJicactive particulate matter,.cycpcration to concentrate a t r:X dactice'co:ati bents in o small volur.e of liquid uaste to be solidified in cc:r =te, inu:.a:. tion'to correntrate activity in a reduced volune of sol;d wartes, filtrnien '.,y charcoal and IEPA filters, and dilution of low :.ctivity 3.q', liquid and ;:m as discharge. It is the objective to operate the nuclear plant an::. the un.te irtoral systen.in such a r:anner as to r.uintain a balanced water inve ;.:. i n t r. : caste d'ispnal tanhage, such that lit tle or no purifj ed liquid vaste discLrr;o frc: the plant-is necessary. This will be accoir.plishcd by recy:lir.g purif:, d water to prirary pinnt take-up. S:311 surplus amounts of i purified

er, together with certain' liquid wastes from the secondary plant, uill b6 di: ited with condenser coolin,t; water and discharged, as they occur.

The uaste ding: cal systen consists of liquid and gas storage tanks, gas stripper, evaprater, incinerat or, uct gas scrubber, pump,, compressors, heat exchangers, filtcrs,1:.rtrecats, piping and valves, all as shown on drawing No. 96P9-P4-41F. Althc.:gh not a part of the caste disposal system, certain waste systems of the secen2 ry plant are discussed in this section so that all waste har.dling A mcti.ds are described in one placc. The potential sources of radioactive liquid and gaseous unstes to be pro:cssed b;. th unste disposal syste:a are as follows: 1%iin Cee)an; System Char;in;,:nf Yoiuno Control System 1 Purifica ic. System Satpling System ,t e Chemicel Shutdown System Vent :.n> Drain System ' Shutdown Cooling System Vapor Centainer Drain Liquid Saf0':y Injection - Shield Tank Cavity System Radioactive inbaratory, Decontamination. Cubic 1c and Decontamination Pad Drain Liquids Contaninatell Launa.ry Drain Liquid (If on site' laundry installed in future) Contaminated Area Floor Drain Liquid Stcan Generator Drain Liquid Ncrerber 12, 1975

'g 209:6 (N-j Proces:w! liquid _ wartes from the vaste dispos 1 systcr. uill bc .scharged only if the netivity contained therein, in combination with any. i.crivit y bd ng releas ed from the stecm genecator blowdor., is within the naximum.permisribic concentration, after dilution, which is established in idi ).cgubtions, Part 20. Although it in pinnne:d to have all contaninntd clothing laundered under contract by a cornercial laundry, all necessary fac))icies are provided for handling the w:.ste liquids frec an on site contaminated laundry. This will perrit _ the insta11ction and use of laundry equipment in the Service Building if this becomcs necessary in the future. The total volume of cont aminated area floor drains and other misec11anecus dralns' cannot be det ernined, llawever, it is expceted that these . liquids will cens'ist of small and infrequent bat:nes of Jew activity fluids. . Processed Gnseous t'astes The processed gaseous wastes consist almost entirely of hydrogen and radioactive fission product gases which are dissolv:d in the liquid discharged to waste disposal, or which continuously leah through or are released inter-mittently to the prinary drain collccting tank by the pressure control valve on the icw. pressure surge tank. Fission gases and hydrogen are co31ected from the distillate accumulator and from the vapor space of all reactor effluent liquid drain and hold-up 1:nks in a complet ely closed caste gas header system. This is compressed to.a gas surge drua, which is bled back to the compressor suction to . maintain a constant pressure on the waste gas header and a cushion to permit filling and emptyin;; of tanks. Initially, this system will be fillcd with nitrogen and this atmosphere may be maintained indefinitely at the option of the operator. The net gas make collects gradually in the vaste gas surge drum and is renoved once cach :ionth from the cor.: pressor discharge line and stored under pressure in one of the three gas decay drums for about 60 days to reduce the activity. The decayed gas discharged from a gas decay drtrr. is .. sed through a deep bcd particulate filter and then released at a carefully controlled rate to )% cither of tuo exhaust ventilation system filter banks censisting of profilters, charcoal and lEPA's. The primary auxiliary building filter train is normally used, however if t.his train becomes inoperative, the vapor container ventilation and purge train can be used. Interlocks are provided to shut off, automatically, the flow of waste disposal gas if either fan stops. After filtration, the decayed gas and exhaust ventilation air are discharged to the atmosphere from the primary vent stack. The stack gases are continuously monitored. The ' processed gaseous traste equipment is desi'gned and sized to acco:enodate the maximum expected activity emanating from the main coolant. Dilution is also provided so that all gaseous effluent accumulated during a period of c^ntinuous plant operation can be discharged at acceptable concentration during two-thirds of the hours in that period. This provides operating flexibility and allowance 'for equipment maintenance. i J i Noveriber 12, 1975

. E;. : t J ~ ,[ .[ 1. 1 o .In the cace of vac to d'ny. cal p2 1t c: rr tic., clo:., a: vh c r. . trierociO~, ccncentrc.tienc occr a 7,eric; of.cne. tr'h cr tr.: yccr, the E crlcultted for can?: rue.:c c::gr~e in en unmot;1c'.ed r;. - *;y be herccc cd 'by c iactc. cf 1;5, cince radicactive air is'io 10 di c e': cced enly 20 out of every 30 anye cf pir.nt operat$ cn. 'Ibic civen a corr cted "PO in the c.ir dischcrced fra the stack of-h.5 x 10-7 nicrocurie pr r.:1 for krypton C5 cr for,:ancn-133 Baced on the interm'.ttent dicchnhcc of L tir.t"re of e.ir ar.d rcdio-cetive )p ypt on-Q and :<enon 133 t o t! - cuction of either iho Prir.ary 1.uxilicry W.11 Sing exhauct fr.n er th. va.pr contairer prc' fan, the volumec .nM uctivit) levels of (;ucocas var.te, c.ccu aing <;].Cing defectc in 1% of

all fuel rcdu, are cc follu;c

Average volume of caceous vacion, ,'205 scf par.nonth Averace crocc actdvity of cacecun vastec: At coro decby, nicrocurie par el 60,1 At CD dayu decay, microcurie por n1 h.31 ~ 8 Diccharce rate of decayed caccouc vactcc-0.43 ocf par br*' , Air dilutio7 volu::c, cfm 23,000' /.verabe croco activity of air dicchurco 123 fro]th.cctach,:picrocurieperml 1.35 x,10-0 Totc.1 cetivity diccharced te the atacc-phere, curic per month 2",,2 Totalvolunecd'rc0icactivohrypton-83 icelenced, rd per r.cnth .16.2 The air discharged from the stach during a 20 day period has a croso activity level about one-fifth that partitied by th; AFC Rcrplations for mir.cd $6cnt$ f$cd irotopac in a rectricted area. In order to caticfy tha /IO propced l'PC of h.S x 10-l microcurde por ml for diccherce two-thirds of tha totcl tjac in an unrectricted area, an additier.cl dilution factor of about h.6 $c required. Since the deccyed cac is being c":itted at 26 fpc, the d.ilution by entraf r= nt above the atack civen the req 2 ired dilut. ion, with uind, speedo less than 10 fpc, without recorting to the Ut=ccpheric diffucica avay from the cource to produce the dilution. At vind speeds in c::cecc of 10 fpc, the turbulent at=ccphem provides a di-lution factor of 5 vithin 30 ft of the stcch. The for.r.ulne in Sect $ on 301, HTIE0:10LO3Y, sho.t that the expected ma::imum cround level concentration, vith.vind spedo of 10 l'po, nnd an effective ctack heicht of 150 ft, is of the order of 1/3,000th of the concentration at the tcp of the ctack; i.e., a dilution fcetor of 3,000. tDaced on d5ccharcing decayed ca: 20 days out of every 30 days , of p] ant operatdon. 7 November 12, 1975 l

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t,.m e... C.,.,_,,. e & o. c ix.... .....m .v s. for r&tvr.;c c.f unidentifi.: incteres in uced ac c bacic for celecting oct points for ecntinuous rai... ts on tenitcring equipant. A necend, lecc rectrictiv,: ce'.; of criter.:.a r.; be ucoa nfler periclic cot;pling and ico-topic. 0ctorr.inuticnu of cteam g noratcr clo.:dce. n and nir cjector effluent to permittni:./t diccharge rate.c ccncir' e:n uith 10 CPR Part 20. The fo13 wing MF0 criteria cre cctabliched to provide a basic for continuouc r.cnitoring. n. For "ura:cctr$cted area" veter-herne activity concinting i or. unidintificd bote or cc."r cai','tcrn or any und>>terained nixturec 'of beta or Cans emitterc": 1.x 10"l A c p.tr ml at the circulatin; unter dicch'.rce to Sher:.:.n Pond. s Sten'.. C=crator ble. "c.cn =enittr a. ham not pcinto vill bc ectabliched baced cm the availtJci31ty of erproxime.te]y 130,0; '> gra of ce:.ic..cc r circulutanc unt cr for dilutien ~ purperec uh.ich vill bc.ntcuTed to cont 3.n no natural or fallout activity. 7 hic diluti':n ic lecc.1On She:T'an Pcad inflo. durinc 19' 1, the L1ricct i cccrded yet.r, 'uhich tverc;nd over 203,C;.D cym. b,. For " tin-entricted arca" nir-borno netivity consisting of "unide".'..fied bet: cr cc:ca emittern or nny ur.dctormined .ninturac of botn or c==a c=itterc": 1 :: 10-9 a c por el at the c.loccet unrcc./1.cted ar m. The air ejector offim.nt tenitcr nJara cet point vill be cctcblichod based on the cynil::l lit'" of unroximatclu J l ~' a 23,000 cia of pri:.ary auxiliar, building exhnuct fan or vapor container purc? fan capt. city for dilutica purpocen which vill be acct =.2d to contain no natural or fhllout nctivity. In additien, a dilu'icn factor of 1,000 vill be assu :cd to be available frem the top of the primary vent stack to the cloccct unrectricted.arca. Smo :c tests 'per-formod under the ecct unfavorabic toteoroloc.ical condition: that ic, with a t:'mp?rature 1:.vercion and licht down-valley vinds - indicate that a dilution factor of a.ni roximatolv. n 9,000 may be expected. ucce cmohc tests arc diccucced on i M pacco 301:3, 3cl:h, and 403:7 I 5 November 12, 1975

... _.. ~ M10:1 3 4.- ,2 216i il VON 'CO';Thll:EL IMSnWim CO::G.0L 5'i3TK:d G en e r a._l.'. ~ The ' vapor container is.a spherjcal st eci envel me desiged to contain all vapors, ' gases, liquids, and iclid mterials Jahich na) be th renuit of } -leaha;;c frc" the prindy systa',.- The atmosphere control ty::te:..s.limi t the vapor container. tc.prature to a ninin.u ; of 50 F in the nint er anf,12GDP duel.;g. sumer 0 operation und U111 renove the airborne radioactivity ch:rine operet. ion ar.d af ter ) shutdown to freilitate refucling and maintenanct o]> ara t h :.s. The syst e:c.s. ale shown on drcuing ::c. 517-F-417. l Yentilntion to Out side At-ornhere Soue airborne.cctivity cay still he prencra in the vapor container air af ter depressurizing -tho ' main coolant. systen. 'jhc vcnt ilation and purge system ) ",.. reduces the activity IcycJ s in the vapor cont ainer to allow persennel access. The purgo systcn capacity is based on the radienctivity in the air of the vapor container at the time the main coolant systen is depressuri:cd. This systen filters the. vapor container air until-the concentration of airborne activity is reduced to tolcrance IcVels as prescribed by the'AEC Regulations (10 CH: Part 20). 123

• Oatside air is delivered into the vapbr container through an air supply unit' (consisting of filters and heating coils), fan and interconnected ductuorh.

The exhaust air froa the. vapor container. passes through a high efficiency filt er assembly (consisting of prefilters, charcoal anJ libPA's) bc fore being discharged up the prjuary vent stach. Hornally closed valveu are provided at the vapor contajncr, to be olened only after the prinary plant has been depressuri:cd. i The air filters, heating coils', and cxhaust fan are located in the [y# ncchanical (quipr.cnt room of the Prl:;ary Aux} 12ary Railding. The inlet fan for ~ the vapor container is located on the roof of the P.A. 1.uilding. The supply nnd e'xhaust air valves are loented at the' container. Two valves, onc 8 in, and one 30 in., nye providt d in the exhaust duct for control of the exhaust air rate. The air 1 caving the vapor container in discharged to the atmosphere through the primry vent sicch located between the Prieary Auxiliary Ruilding and the vapor container. The components of the ventilation syst en are shown on drawing No. 517-F-417. Itecircul ation, llcatinJ: and Cooling, llent released during plant operation from hot insulated and uninsulated surfaces, together with solar radiation, contribute to the heat gain of the vapor container air. The vapor container is complete 1; scaled from the natural atmosphere and no air, other than that which leahs from the container and is replaced by the leahnge uonitoring system, enters or leaves the container during operation. The v.cntilation systen cooling units linit the air temperpture inside the container to values which will prevent damage Norenber 12, 1975

i + 2 2 2. :.. 5 e' .o l s Ro6f exhru:t fans are providd for surner heat rer: mal for the tachine thop and..*ater'tresting plidt. 'Out? : air for ventilatir of the nachine shop is dran thr~:gh cp.;.i vindous and dcors wJ for t he unt er tre:.tment plant through louvured. epings : in tho.cxt erior toll. Sur :.cr vent.ilation for nirnt stores,: service office and contauinated 'inr,trum. nt roct in L) natural r..cens th cu ;h open'en.'ous. The unit ventilator and air cor.ditioning equipment for the supply air are located i n n:cb nical equip.ncnt re:a ;o.1 abbvo the Service Iuilding. roof. 'ihis rocr also houses the decontauimition cu'aj cle exhust fan as well as water I h:eting equi; rt, hot unter 4: eating systen heat exchanger, expansien tank and ci rculat ort.. 'Ihe-nerhanical equipment room is exhausted in the sunuer by a.

thermosta:Idllv chntrolled roof exhaust fan, interlocl.ed with a notor operated i

danper asso:inted with a louvered cir intahe in'the exterior vall. Of fi e c P,uil dlu_.r b'ith the exception of the toilet and locl.er roots and the janitor's closet, ventilation of spaces in tb Office 1;uilding is by natural neans through windows. A unit ventilator serves the toilet and locher roons. Air is exhausted frou these spaces by a system connected to a fan located above the roof. Prirm v Auxiliary I;uildi._n,g In the rad.ioact ivity cican p::rtion of the Primary Auxiliary Duilding a roof typ: Jenbr.ust fan provides su::.r.er ventilation with supply air entering through open vindows' and doors, Vcntilation, heat removal, heating, dilution and filtration of possibic l 123 hydrogen leabge in certain equipment compartnents during operation and nain-tentnce parieds for the potentially contaninated porticn of the Prinary Auxiliary Dailding are p:cvided by a supply system and an exhr.ust system. Filtered outdoor air, heated when required, is furnir.hed by a supply unit ventilator located in mechanical equiymeni room ;;o. 3 and is distributed by ducts to the potentially contaminated area. Air is exhausted from each of the shielded compartments through ducts connected to a high efficiency filtcr assembly (consisting of prcfilt ers, charcoal and llEPA's) and an exhaust fan which discharges to the 12q primary vent stack. The filter assembly and exhaust fan are located in the techanical equipment room. Provisions are made to pernit the use of the vapor container purgo filter assembly or fan for Primary Auxiliary Building exhaust in the event the Primary Auxiliary Building exhaust filter assembly or fan becomes -inoperative. The techanical equipment room is ventilated by the systems serving the potentially contaminated areas of the building, b'ast e Disposal Luilding Air from the waste disposal building is exhausted to the mechanical l 125 4 h'ove:nber 12, 1975 i 1

>s. ~st...=e o k . cqu: p. c r.t. re:..:. ':a. 3. There, it is joined by the Prin ry '.uxiliary Lullding ' -c>a t.uct f.ir natilation for filterir,, throtch the high effici en:y. filter x astcri b. 1,fx : w.i n.c. dischar.c.ed t o tho' 13rimar.v vent stack by the Primar,v 125 Auxili::r; 1;ui1Jhig exht:ust fan. Tnere is a t::.11 nounted exhaust fan in the \\;apta'ga; c m:n wror rcem that will autoratically start in the event air flou in'.thi du;t syste: is lost. Mahe-up air is heated in tho' winter.by unit 'heators. F :cl T :- f6r Pit Jousc -Yentilation for the fuel transfer pit house is a]r.o provided by the 125 - Prir.ary '.

.1f.ry.I:uildi:.g. c.xhhust f..n via the high effici ency. filter assembly.-

Af tcr filt ni:. the fan discharges the exhaust air to ~ the primary vent. stack. Ord:or cir enters the structure through.a wall nounted - supply 36uver. 4 ? e 1 1 ~ i Novenber 12, 1975

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