ML20212M582
| ML20212M582 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 05/01/1975 |
| From: | BOSTON EDISON CO. |
| To: | |
| Shared Package | |
| ML20212M446 | List: |
| References | |
| NUDOCS 8701300171 | |
| Download: ML20212M582 (8) | |
Text
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, e y; .. CIS Vi'T!,fA!;C E Td 407: c C r
- , p - IJMITIM COUT;ITIO:~1 FOR OT?TtATIOM 4.7.D nearh y <'.n Te. * ,o ev.:t-h 3 7.B ctaraby m a Trmt.a nt evst<2 ,.nd Cor. trol 160- i 'h :Ticie r.cv Cor. trol lux,- 't -h ITri ciene / Air Filtration : t s: e:.
Filtration ?tstea
~8 1. Standby Gas Treatzent System
- 1. Stardby Gas ircat=.cr.t Jyste
- 4. (1.) At least cr.ce per
- a. Except as specified in operatinc cycle it 4:.2-.
3.7.B.l.c below, both trains be demonstrated tnt of the standby gas treatment pressure decp acrcee '....
system and the dicscl Cenera- combined high efficic..a tors required for operation of filters and charcos1 such trains shn11 be operable adsorber banks is le;;
at all ticca when secondary than 9 5 ir.ches of .a w r containment integrity is at 4000 cim, required.
(2.) At least once per cyr: .-
- b. (1.) The results of the in- '
ing cycle demonstrate tr.c.
O phee cold DOP tests on the inlet heaters cn u.ct.
HEPA filters shall show train are capable cf an O gg9% DOP removal. The output of at least 14 kW.
results of balogenated g hydrocarbon tests.on (3.) The tests of Specifi:stici.
charcoal adsorber banks 3 7.B.l.b.(1) shall te p r-o shall show A99% balogenat-formed whenever verk is der ?
ed hydrocarbon removal that could adversely e.ffec-when test results are the filter system efficie:. f extrapolated to the and at six conth intcrysl:
initiation of the test. between refueling out:.;es.
( 2.) The results of the laboratory carbon sample analysis abal.1 show A95f, (4.) At least once each fice years a charcoal filter
'O sethyl iodide removal at shall be recoved and a vel city within 20% of adsorption shall be O system design, 0 5 to demonstrated, O
1.5mg/elinlet methyl iodide concentratio ,
(5.) At least once per cprat-As70% R.H. and &.190{7. ing cycle automatic initiaticn of ca::' ._
- c. From and after the date that of the standby 6as 2-one train of the Starvthy Gas ment system shall be Treatment System is cade or demonstrated, found to be inoperable for any reason, continued (6.) Each train of the star.dLy reactor operation or fuel gas treatment systcc shai'.
bandling is permissible only be operated for at le:.st.
n ,
during the succeeding seven
&m 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> per mor.th.
t$
r days unless such train is
-o sooner sade operable, provid-ed that during such seven day (7.) At least once per N
mo all active cocponents of the operating cycle tru..
operability of the. t ,,Ns.
-1 other standby gas treatment valves for filter ceca..,
train aball be opershle.
',$ shall be deconstrated, oa d. If Specification 3 7.B.l.a oe hy and 3 7.B.l.c are act mot, 0 yuocedures shall be initiated oa it.aediately to establish Q reactor conditions for daicia the Standby Gas treatammt. .
- F8NVMI.fAf*fT Rd i
'T 1271 tt m CO':l>TTIU:.' FOR Ol'+ATIM
- b. (1.) cold to t ::tir.; :.v,1; Control Room !ilch Efficies cy Air hs
- 2. ,be pers cr ce! c:.
Filtration System filter:; :Jter v./v:a
- co.t.plutud or p;.rtial h
A a. Except as specified in replace:..cr.t of tan :f. . .
Specification 3 7.B.2.c filter c,ar.k or o ftcr L.
If below, at least or.e train of str ctural c. sir.ter.ar.cc v:.
the Control hoom Hir,h Effi- the .EI' filter b stes g cier.cy Air Filtration Systen
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housir.J.
nes1 for the processing of ir. lee 3ir to the contrc1 roofs (2.) lielo;ct.oted hydrocarbc:.
ur. der accident conditions and testir.; ctsil oc perfer..a the diesel generator (s) on tne c mrcoal adsorber required for operation of bank after coch partial this train of the system shal) or coc:plete replacec.cnt be operable whenever seconder) of the c't.srec41 adscroce contain:r.ent integrity is bank or after any required, -
structural maintenar.cc on the charcoal adsorber h '" b. (1.)The results of the in- housing.
place cold DOP tests on ,
y O HEPA filters shall show c. When one train of the. Standby
$ DOPofitemoval. The Gas Treatment System becoces N results the halogenat- inoperable, the operable train O ed hydrocarbon tests on shall be demonstrated to be charcoal adsorber banks operable innediately and daily shall show >_99$ thereafter.
halogenated hydrocarbon removal when test results 2. Control Rooct High Efficiency Air are chtrapolated to the Filtration Systen i
initiation of the test.
C a. At least once per operating (2.)The results of the laboratory carbon sample cycle, the pressure drop O across each combined filter analysis shall show .k.9$$ train shall be de .cnstrated C rethyl. iodide removal at a velocity within 306 of to be less than 9 5 inches O of water at 1000 etc.
system design, 0.05 to O.15 mg/cl inlet methyl b. (1.) The tests of Specification iodide concentration, p.,705 R.H. , and c 125 F. 3 7.B.2.b(1) shall be performed whenever work is done that could adversely
- c. From and after the date that affect the filter syste:.
both trains of the Control efficiency and at six-Roco High Efficiency Air month intervals between
- Filtration System are made refueling outages.
er found to be incapable of supplyind filtered air to (2.) Cold IOP testing shall be the control room for any performed after each reason, reactor operation or pomplete or pr.rtial refueling operations are replacesant of the ti. EPA permissible only during the filter bank or after any succeeding thirty days unles s sooner rade operable. structural caintenarre cc the system housisg.
- h. d. If Specifications 3 7.3.2.a ( 3.) lialogenated hydroctrbon or 3 7.B.2.c cannot be met, ' testing aball be periorr.co procedures shall be initieteJ
- after each ooglete or immediately to estaMina ,
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~. FIRVFf UAME PM'IfIP/Fl?i-i
~i 2 ' . IJMITTna 6ei>tTt0"J p nWM ,
partial replsc< :U. .t c ' ,
retictor cor.ditions for which the clarcoal udror.r;r the Cottrol hoco !!igt Effici- t,ur.k or arter ;.i.,
ency /,ir Filtration System struccural 41.........c 9 is not required. the sycto:r. housir.;.
(4,)At1 crest 0:ceetc.'.f'.
bests, h cr.srecal filter '
stu.il 'oe re::oved or.'2 adsorption s.nli 'u';
de:ans tra ted.
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$ 3 7.3.1 and 4.7.9.1 - r,tandby a.a Treatnent :' cut %h t :,he reactcr Ihe Stardby Gas Treate. cat Gystem is designed to filter t int.nd ex aus laticn fans are buildind ccnditicns.
at::4 sphere to the stack durin; secor.Jary contair.r cr.Upon e designed to sart to bring the reactor building pressure s.esAfter i nia.ed a preset time delay, the st it.lcskacc .
leah ce should be the auto:Atically shute dcwn so the reactor building pressure ic ::. nShould one syster. fail to start, Each of the two trair.s apprcxirately 1 inch cf water negative.rdur. dant systen is designed to start au has 100,ca peity.
d High Efficiency Farticulate Air (EEPA) filters are rinstalled prticulates The to before an after the charcoal adsorbers to minimize potential release o b the environ.ent and to prevent clogging of the iodine adscr i l release ers. of pg charcoal iodine adsorbers are installed to reduce the potent aThe in-place test results s radioicdine to the environs:ent. the charcoal O systen leak tightness of less than 1 percent bypass leakage l offor adsorbers and a HEIR filter efficiency of at least 99 percent recovaThe labor N cold DOP particulates.
o indicate a cethyl iodide renoval efficiency of at least 95 percent forTh expected accident ecnditions.charcoaA and particulate filters is sufficient to preclude guidelines for the accidents analyzed. 1 d 'fID 14o4 fission i
' accident assuend a charcoal adsorber efficiency of 95, b rsanHence, and requiring 994 e 9 product source terms.adsorbers and particulate filters and installing two banks of adsor eA 1 filters in each train provides adequate cargin. l of o relative hu=idity below 707, in order to ensure the efficient Considering recova the O cathyl iodide on the impregnated charcoal adsorbers. relative simplicity O cycle is adequate to deconstrate operability. h O Air flow through the filters and charcoal adscrbers for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> each rent assures that =cisture will not accu-ulate in dthe will filters or adscrbe through the filters and adsorbers will be 6 70f, relative humidity a .
have the desired drying effect.
Tests of impregnated charcoal identical to that used in the filtersdide indicate
. that shelf life of five years leads to only minor decreases in cathyl ioHe renoval efficiency. Since adsorbers e.ust be recoved is adequate to der.onstrate acceptability. f to perform this analysis, this frequency also minimizes the systen out oIn addition, althou service time as a result of surveillance testing.
halo;ct.ated hydeccarbon testingf the is basically / leak test, the a a
relative Nthyl iodide, the testin; also gives an indication o efficiency of the installed system.
flcw rate is that flow, less than The required Stuziby Oss Treatment Syste: Aintain the Reactor Duildir.g at a
'; tis capability 9 or egal to tOCO CS, whicu is r. ceded to :
0.D inch of water necstive pressure under cal vind conditions.
is adequately dcconstrated during Secondary Contair.rxnt leak Rate Testing perforced pArsuant tc Technical Specifica), ion 4.7.C.l.c.
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5 T1.e test frequencies kre adequate to detect equirrent detericrution pricr to signi ricant defects, but the tests are isot frequent erioudh to load ti.e filters or udsorbers, thds reducir.J their reserve capacity too quickly. The filtur testind is perforzed pursuant to hppropriate procedures roeiewed ks.d a;Trvied 9 -
by the Opersticns Revicw Coca.ittee pursuant to Cection 6 of tr cae sechnical Specifications. Tne in-p1mee testing of charcosi filters is perfcr:.ed by injecting a halocenated hydrocarbon into the system up.itreu.t. of the charec61 adsorbers. Xcasurenents of the con:entrktion upstrch . and dcynstrc .:. are cade. The ratio of the it.let and outlet concentrations gives nn overall indication of the leak tightness of the system. A sicilrir procedure substituting dioccylphthalate for haloger.ated hydrocarbor. is used to test the IEIR filters.
Pressure drop tests across filter and adsorber banks are performed to detect plugging or leak pths through the filter or adsorber media. Considering the relatively short times the fans will be run for test purposes, plugging is unlikely sai the test interval of once per operating Cycle is reasorAble.
y System drains and housing gr sket doors are designed such that any leakage O would be inleakage from the Stardhy Gas Treat =ent System Rocc. This ensures that there will be no bypass of process air arcurut the filters or adsorbers.
Only one of the two Standby Gas Treatmer.t Systems (SBGTS) is needed to cair.tain O the secondary containment at a 0.25 inch of water negative presnure upon contaiwant isolation. If one r.yaten is found to be inoperable, there is no ictediate threat to the contairment syster. performance and reactor operation or refueling activitics say continue while repairs are being sade. In the event one SBGTS is inoperable, the redundant system will be tested daily. This substantiates the availability of the operable system and justifica continued reactor or refueling operations.
43 If both trains of SDGTS are inoperable, the plant is brought to a condition where the SBGTS is not required.
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h 3.7.3.?.b and b.7.3.P.b - Cor. trol 2com Ji h Ffficiency Air - 11 * -c .ic r.
Ti.e Cor.trul hoc:: :.ich Mficiu.cy Air Filtratior. 2yster.1: declar.co to fM:.cr it.take air Icr the ccr. trol roo::. at::4c;.r.tre duri:.; cc:.ditie:.:. wr.cr. :.or .:.1 intake air r ay be cer.ts .ir.ated. Follcsin; r.:.ra.al ir.itia ticr., .nc Ce:. trol Room Hich -fficier.s Air Filtratica fj; .e :. is desi;:.sd to po:itic: c:.n purr. :.: a start nr.s wnich di .crt tne ncr:z.1 air ficw thruug.. c.arce:.1 ad:creers Wcre it reaches the cc:. trol rcoc.
iiigh Efficie.cy Ft.rt.iculste Air (HZPA) filterc are installed before the charcoal adsorcers to prevent clc;gir.g of t:.e icdir.c acsorttes. ~.te chsrcoal adsorbers are installed to red cc the potentir1 Ir.tt.hc of radioicdine to the control room. A secor.d bank cf IEPA filters is ir. stalled cownstre.a.:. of the charec21 filter, ga The in-place test results should indicate a syste leak tightr. css of less than 1 percent bypass leakage for the charecal adsorcers nno a . EPA O efficiency of at least 99 percent removal of cold DCP particulates. The laboratory carbon aanple test results should indics.te a r ethyl iodide re. oval efficiency of at least 90 percent for expected accident conditions. Tests of o impregr.ated charcoal identical to that used in the filters indicate that shelf. Life of five years leads to only mir.or decremscs in cethyl iodide recioval efficiency. Hence, the frequency of laboratory carbon sample analysis is adequate to deconstrate acceptability. Since adsorbers c:ust be recoved to perform this analysis, this frequency also minimizes the systen out of service ties as a result of surveillance testing. In addition, although the halogensted nydrocarben testing is basically a lersk test, the adsorbers have charcoal of known efficiency and holding capacity fcr ele r. ental iodine and/or cethyl iodide, the testing also gives an indication of tne relative
.C efficiency of the installed systes.
O Determination of the system pressure drop once per cperating cycle provides o indication that the IEPA filters and charecal adsorbers are r.ot clogged by excessive sciounts of foreign cAtter and that no bypass routes through tne filters or adscrbers had developed. Considerira tce relatively shcrt tic.es the systec.s will be operated for test purpcses, plugging is ur.likely and the test interval of or.ce per operatir.g cycle is rer so:.abic.
The test frequencies are adequate to detect equipment detericret.icr. prior to significant defects, but the tests are not frequent enough to lead the filters or adsorbers, tnus reducing their reaerve capacity too quickly. The filter testir.g is perforced pursuant to appropriate procedures reviewed ar.d approved by the Operations Review Committee pursuar.t to Section 6 of these Technical Specifications. The in-place testing of charcoal filters is perforsned by irdecting a haloget.ated hydrocarbon ir.to the syste:n t.patreac. of the charcoal adsoroers. Feature-.cnts of the concer.tratics. upstreur. and downstres: are cade. Tr.e ratio of the inlet nr.d ou*.let concentrc;,ior.s gives ar. overall irdication of t.he lesk tigntr.cas of the syste.. A sir ilar procedure substitutit.g dioctyl phthalate for haloger ated h>drocarbor. is used to test the HIPA filters.
If both trair.s of the systes are found to be it.cperabic, there is r.o l .
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Cor. trol Roc, ci h Ef ficione. Air - 11' v.' e n h ~4.7.3.P.b and 4.7.3.2.b tlc Cor. trol hoc . :.ich aficiu.ey Air F11crattor. System 1:
ded.*r a r.c r atcr
- .c rial it.tske air rcr the ccr. trol roos atrocpr.i.rc duri . ; cc,:.ditie:.:. wr.ct,:.t.al ir.itia tics, tnc Ce:. trol intake air ray te cor.the.ir.sted. Follcsin.: :.:4 Boon Hign ifficier ;, Al.r ne Filtrratica tcr:Al airfjc".e ficw :.thruug..
is desi,:rrd to po:itic:.
c.'.6recal ac:creers cssrur:
be.bre star . ru.s wnich divtrt it recche: the cc:. trol rcoc.
siign Efficiency Forticulate Air (EPA) filterc are installed bercre Tr.cthe chsrcoal charcoal adsorcers to prevent cloggir.g of ::.e icdir.e sowr<ccrs.
adsorbers are installed to reLec thc potentir.1 Ir.tske of rudicicdir.e to the control room. A secor.d bank cf EPA filters is ir. stalled ocwnstren . cr the chareal filter. leak tightr. css Of less in The in-place test results should indicate a syste than 1 percent bness leakage for the charecal adsorcers rano a ciEFA The O efficiency of at least 93 percent rezoval of cold DCP particulates.
laboratory carbon sample test results should indicate a r ethyl iodideTests re:cyal of N efficiency of at least 90 percent for expected accident conditions.
impregnated charcoal identical to that used in the filters indicate that a shelf. life of five years leads to only mir.or decreases in methyl iodidethe frequen removal efficiency. Hence, is adequate to deconstrate acceptability. Since adsorbers cust be recoved to perform this analysis, this frequency also cinicizes the system In addition, out ofthe although service tice as a result of surveillance testind. the adsorbers have halogenated hydrocarbon testing is basically a lerak test, charcoal of kr.own cathyl iodide, the testing also gives an ir.dication of tne relative
,Q efficiency of the installed systes.
O Determination of the system pressure drop once per cpera .ing cycle provides indication that the HEPA filters and charecal adsorbers are r.ot clogged by o excessive amounts of foreign cAtter and that no bypass rcutes through tne filters or adscrbers had developed. Considering tne relatively shcrt ti:.es the systera will be operated for test purposes, plugging is ur.likely and the test ir.terval of or.ce per operatind cycle is ressor.able.
The test frequencies are adequate to detect equipment detericratior. prior tc significar.t defects, but the tests are not frequent enough to 1 cad the The filters or adsorbers, thus reducirg their reserve capacity too quickly.
filter testira is performed pursuant to appropriate procedures reviewed ar.d approved by the Operations Review Come.ittee pursuar.t to Section 6 of these Technical Specifications. The in-place testing of charcoal filters is performed by injectise a haloger.ated hydrocarbon into the syste:n upstream of Feature ents of the concer.tratics. upstre6r. and the charcoal adsoroers.The ratio of the inlet ar.d oatlet cor. centri.tions gives downstres: are cado. A si:.ilar ar. overall indication of r.he lems tigr.t.r.ess of the syste..
procedure substitutind dioctyl phthalate for halogerated h)drocaroor. is used to test the EPA filters.
If both trair.s of the systes are found to be it.cperable, there is r.o
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imacdiate thrust to the control room had reactor operat on or O cay If atcontir.uc 1 cast onefor a lidted of the period system of tino while rupirs kru L, re ei
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truir. car.not be topired withinthe Efficiency Air Filtrution Syste:n is not required,
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e iG.!11 3.7.c - rencr.6.rv Cor.t ils.me:.t h The secor4ary contaircent is designed toa dnir.ize round IcVel reicsse serious t.ccident.
any c The of radioactive r.Aterials which richt result fromduring reactor operation, reactor building provides secondary i contairnent;d the the reactor drywell buildia.; provides is crec,t.s w' en the dr*//cll is scaled and in serv ce f prirary cor.tairnent wher. the reactor Because ist shutdovr.
accondary containnant ar. is in:sent is required et allan it.tc;rsi part o durir.d refulinJ.
the complete ccntairc.cnt syste=, accondary con ad as well as during refu lir.;.
times that prir.Ary containment is require h tar.dby gas Initiating reactor building isolation and f water negative operation of tpressure es treatcantsystemtomaintainatleasta1/4incho t test of the operation of the h reactor buildir.g P%
within the secondary contairmant provides an adequa erea and perforcance of the standby gas treat = ant l system.deconstrates the O the initiating sensors and associated trip char.n= sPerforming ility prior to thethese tests prior to _
capability for automatic actuation. ' Periodiccapabtesting g refueling will demanstrate secondary contairment ity and stardhy gas o time the primary containment is opened for refueling.gi treatment system perforcance capability.
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