ML19246B003
| ML19246B003 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/21/1979 |
| From: | Kaplan D, Walbridge W SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| References | |
| NUDOCS 7907100509 | |
| Download: ML19246B003 (50) | |
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,c m p t f rom t he requested Clas> TIl ice uncer t he provision of Footnote 2 to la CFR 170.22-Footnott 2 does p e r:, i t the en npt ion of cert ain types of 1ic.nse areni.'nts ire a f ce.. These ate 1. Those in fee Classes !, II and 11} vhich re, ult iron tritten Co:vnis< ion request provid.'d that t he: havc an2y ninor 'afety significancc, are ta simplify or clarify the 11cence er Technical Cpec i f i ca t ions and are being is su+ J for the convenience of the Coa.m i s s i o n,.cd 2. Orderr issueJ by the Co:~i<> ion pursuant to la CFR 2.204. 1*'o" f*"m R Purr!1 The Cor:i m:i cn requented t
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Da v i <- dated February N. 1975. T h i r, revision adde sporific Li.ii t ins, coditiox f o r Ope ra t i c.r..pp l ic;.cl. to air filt er syst em r.d spect ie-that t h. n th:.1 ieJide t e :.o s. ;l effic:ene of t he charcoai filters be d e t r :': a ni et leest even: 71'O ho o n ei operation:,. Wherever posnible, thi: proposed ar,end'ent brin,, th f ac il i t :, ventilation and N'CCI[i Cal i ollE, [$1tel I M l e"M i nt.o a! ret Mellt Uit [ };. lali ;l Sl ant!?l! d I UC hn it ;il t Re c,u } a t i on Ctli des, arid a pp l 1 Caill e i t a nila rd:.. % e h.h Ns:; ~,,- v
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/ yo c [(}IlC Ibl[' i (, ll 2 ( I II L 9 '..i' l ': TH! .. 'r1 0; t ', ! I f i'l' k !5 t 5 Director, treactor Licensing June 21, 1979 You wi11 notice in t he at taci.ed replacement pages which comprise Proposed Amendt:.ent Mo. 32, Revision 3, t hat the title of Specification 4.11 har changed f rom " Reactor Building Purge Filtering Systen" to " Auxiliary an.i Spen t Fuel Duilding Filt eri,g Sy _; ten." As discussed and agreed upon in previous t ransmi t ta ls., this constitutes delcting the specification on the R< actor Pu rge 1ilter. This is allowed as the filter is not used or required for any inposed accident at the facilitv. While d,letion of this filter systen from the Technical Specification is just ifiel by its non-safety func-tion, the system w!11 still be maintained and opere;ed to assure the requirements of SRC Regulatory Guide 1.112 are net. The next significant change by Proposed Amendment No. 32, Revision 3, is deletion of the requirenent to imrf orn an "in-place" leakage test on the Reactor Buildinh Emergency Filt c ring Syst en. Since this syatem is fully contained withir the Heactor Buildine where it provides recirculation air cleanup in a post-LOCA condition, it satisfies the conditions of ANSI N510. 'lable 1, for which suc' testinn is unnecessary. Added to the existing license arc new and specific surveilla ce requirenent s on the Auxilia ry and Spent Fuel Building S'. sten. A detaihd review of t he potential non-LotA accidents has revealed that c red i t has been taken f or t his filter systen in these analyses. Hence, it is proposed to add requirt a nts to the facility license that,:ill assure that the assun<l effec-tivenes of t hes" iflters will he available. 'Th i l e conductinr, the rev M for this systta, it was deternined that a previously unrenitored release point,:a - available from the Auxil ia ry Bu ild ing t o the environrent. A f i lter syst e:, r:ect inn design requirements similar to those irposed upon the Auxiliary and Spent ruel Building Filter 9 4 ten is being procured and installed. This Pro-posed Anendment 50. 32 Hevision 3, establit,he' the Technical Specification require:ents for operat ion of t his new filter unit when :nstalled. Your staff proposed a revision to our Technical Specifications which would have established testiny criteria for ai - 6 n rs.chich were assumed to be inct alled in the facility fi l t er syst ers. The design pa raneters for Rancho Seco do not require that heaters be installed a< humidity cont rols on the operating filter systens at Rancho Seco. Therefore, we have deleted the staff's recor < n t ions regarding t est ing cri t eria for heaters anich are not required nor installed at Rancho Seco. Coincidentally, the laharatory testing condit wns for t b" installed activated charecal m e now tstablished to be those representative of t he actual accident in normal conditions to whi ch t he charcoal will be e::pe s ed, rather than that which would re, alt from th-operation ot' heaters ahead of the charcoal filters. Respec t f ul ly subm it t ed, SACRAMF?rfD W NICIPAh UTILITY DISTRICT 3 -l hptg n b lEt O t r. $; '..i 'i j 'S$ --- - s D :v :u. sap lan Wm. C. Wa lbridc;e / V Legal Counsel General Managcr Sacranento Municipal Ut ility Dist rict U d 7 ') 7 h, Director, Peactor Licensing June 21, 1979 Subscribed and sworn to bef ore tre 7 this 22nd day of June, 1979. $'&..H0[ ,~h,,-: ~,;,<;. 7
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,s., p\\1 _ ~_ y g., .; z5 G \\; ' //x lje t t y M.i t t i e r', Notary Public in and ,4.", i o r the County of Sacrar: ento, J.Ubb'." State of California s 1!y Con: mission Expi res 1 't' O ,m i p' e' ) 1 - T s < i_ RANCHO SECO U'llT 1 TECHNICAL SPECIFICATIONS Limiting Conditions for Operation 3 13 AIR FILTER SYSTft15 Ag licability_ lhis specification applies to the operability of the em rgency control roon' filtering system, the Auxiliary and Spent Fuel BuilJinq filter systems, and the Peactor Cuilding emergency filtering systen. .O__b.j e c t i ve To assure that tF se systers will be able to pm rforn their design functions. 5;rc i f i c al ion 3.13.1 The evergency contres roo. ilter systen and the Reactor Building crae rge n cy filtering syste-shall be operable at all t irce s v.he n containment integrity is rec,uired, exccpt as noted in 3.13.3 and 3.13.4 belua. 3.13 2 One Au,,iliary cnd Spent Fue! Buildion filter unit must be operable. Th" r eact or sha l l be placed in a hot shutdo;n candition within t v.e l ve (12) hours any tine both units beco t i nope ra b l e. 3.13 3 Vi t h t he er creency cont rol room filter systcm inoperable, restore the (7) days or be in at least hot system to op, Nble status within seven standby within the next six (6) hour; and in cold shutdoan within the fo! lowing thirty (30) hours. 3.13.4 If one of the t.;o RB eraergency filters is rade, or found to be, inoperabie for any reason, reactor operation is permissible only during the succeeding thirty (30) dayr provided that all active components of the other in-containnent air treatment circuit < hall be deronstrated to be operable within eight (8) hourt and daily t ht. r ea f t e r With both RB emergency filtering systens inoperable, the reactor shall be placed in at least hot standby within the next ,ix (6) hours and in cold shut-down vithin the folloaing thirty (30) hour s. Bases The t im to return a Reactor fullding Ercrgency Filter to operability is allowed because tuo 50 capacit,, Rb Spray Syst ems and t he ot her RD Er..ergency Filter are available for SFAS requir: cats Tech Spec 1 3.2 overs fan and cooler operability. See also Sections 4.10, h,11 and h.12. Froposed Awndment No. 32 Rev. 3 3-52 M' ' j 7 ') 7 r Ju RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Surveillance Standards 4.10 EMERCENCY CONTPCL ROOM FILTERIN'; SYSTEM Appiicabi1ity Applies to ti e cmergency cont rol room filtering syster components. Objective To veri #y that this systen and its components will be able to perforn their design f onct io is. Surveillance Requirements ~, 4~.10.1 The Cor.t rol Roon. Erergency Ventilation Sys t ern sha l l be: A. D mons t ra t ed ope rab l e a t least once per quart er by initiating f,0w through the ventilation /caaling system and deronstrating that the ou t s i de a i r raakeur sys t er, flow is 40 cfm 1 20 percent, D. De onstrated operable at least once per refueling interval, or onca every l o r,on t h s, whic ht ver occurs first, or after each pariial or ce.:ple'e replacement of the HEPA filter bank or charcoal cdsorber bank, or following painting, fire, or chemic.1 release in tne operating air rcakeup s,- s t e 1, by: 'erifying that the charcoal adsorbert remove ;99 percent of a halo; ena ted hydr ocarbon refrigerant t e.t gas when they are tested in place in accordance with ANSI N510 while operat-ing the filter train at a flow rate of 60 cfm i 20 percent. 2. Verifying that the HEPA filter bank rc ave _>99 percent of the DOP aber they are tested in place i n accordar e wi t h ANSI N510 ohile operating the filter train at a flow rate of 60 cfn i 20 percent. 3 Verifying within 31 days after reroval that a laboratory analysis of a carbon sample fro'i either at least onc test canister or carbor sanple re:uoved f ro;) oae of the charcoal adsorbers demonstrates a removal efficiency of ;90 for radioactive rethyl iodide when the <,'ple is tested in eccordance with ANSI N509 (30"C, 954 R.H.). The carbon samples not obtained from test ci'nisters shall be prepared by either (a) Fr.p t y : ng on entire bed fron a removed adsorber tray, nixing the adsorbent thoroughly, and obtaining < in ip l e s at least two inche< in diameter and with a length equal to the t hickra ss of t he bed. P ropose l Amendraen t No. 32 Rev, 3 4-41a )' n A[. 'IJd.
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RANCHG SECO UNIT 1 TECHNICAL SPEClFICATIONS Surveillance Standards Surveillance Requirements (Continned) 4.10.1 B. 3 (b) Er:p tying a longitudinal sanple from ar adsorber tray, mixing the adsorbent thoro:gh!v and obtaining sar ples at least two inches in dia>eter and with a length equal to the thickness of the bed. 4. Verifying that the pressure drop across the combiried hEPA filters, and charcoal adsorber banks is c6 inches Water Cauge thile operating the venti 1ation makeup systen at a flow rate of 40 cfc. + 20 percent. 5igh radiation signal, the normal systen 5 Verifying that on a automatically is isolated and that the Energency System operates. 6. Verify t t.e ai r r akeup syst en ruint ains the room at a positive re ative to the outside l pressure of >0.005 inches W.C. atmospocre with a flow of 40 cfm + 20 percent. C. Der :an.t ra t ed ope ra bl e a f t e r eve ry 720 hoort of charcoal adsorier operation by; 1. Verifying '!ithin 31 days after r er;ov a l t', laboratory analysis of a carbon sa pie fru either at leo >t one tc st canister or carbon < ample remved f rom one of t he charcoal adsorbers deronstratec a removal efficiency of ~ 9 0.. for radioactive rethyl iouide,. hen the sa:ple is tested in accordance wi t h /m i N509 ( 30"C, 95 R.H.)< T he carhon samples not obtained fro. test canisters shall be pcepareJ by either (a) Emptying one entire bed fro,a renoved adsorber tray, nixing the adsorbent thoroughly, and obtaining surples at least tuo inches in dim ater and with a lengt h equal to the thi:Lnes< of the bed or, (b) Emptying a longitudinal saople from an adsorber tray, mixiag the adsorbent thorouchly, and obtainino sample' at least tua inches in diar eter and with a length equal to the thickr - s of the bed. 2. After reinstallation of the sanpled adsorber tray, per C.1: (a) Verify that t!" charcoal adsorters renove 199 percent of a halogenatt d hydrocarbon refrigerant test ga< uhen they are test eJ in place in accordance wi t h ANSI N510 vhtle cperatinq the filter train at a flow rate of 40 cfm 1 20 pertent. P roposed Arc.endmen t No. 32 Rev. 3 h-416 M y< . "j : un xs RANCHO SECO UNIT I TECHNICAL SPECIFICATIONS Surveillace Standards Surveillance Requiren nts (Continued) 4.10.1 C. 2. (h) hrify that the HEPA fiIter bank removes 199 percent of the DOP when tested in place in accordance with ANSI N510 while operating the filter train at a flow rate of 40 cfn + 20 percent. Dases The purpose of the emergency control room filtering systen is to limit the particulate and gaseous fission products to which the control room area would be subjected during an accidental radioactive release in or near the Auxiliary Building. The systen is designed with a filter train which consists of a prefilter and charcoal filter ahead of a high efficiency particulate filter, and charcoal filter with a booster fan to pressurize the control room with outside air. Since this system is not nornally operated, a periodic test is required to ensure its operabi1ity Uhen needed. Quarterly testing of this systen ui1I s hu'.. that the systen is available for its safety action. During this test the system will be inspected for such thing as water, oil, or other foreign ruterial', gasket deterioration, adhesive deterioration in the HEPA filter; and unusual or excessive noise or sibration
- t. hen the fan ators are running The flow of 40 cfm was selected to 1init the r a x i nu, radiation dose to occupants of the control room in an acciden For this analysis, both charcoal filter bank < were assu:ed to proside DF's of 10, while the HEPA filter DF is assuaed to be 100.
Refualing interval testing will verify the methyl iodide removal efficiency of the charcoal and the arount of leakage past the charcoal and absolute filters are at least equal to the desian values. The charcoal adsorber efficiency acceptance criteria is set significantly higher thar required sa es to assur e a DF of 10 will be available to the next test interval. The systen is outonatically s t a rt ed, and t he no rna l syste:i isolated. aben the radiation level in the control room increases, or nanually,;he n e ve r Jesired by Ihe operator-fhe testing requi red a f t e r pain t ing, fire or thenical release, is not to be interpreted to include ninor touch-up painting, lighted cigarcttes, ho u s e's ee p i n g chemicals and detergents, or other sinilar activities cocton to the normal routinc. Proposed Amendment No. 37 Rev. 3 4-4]c 'l f* L i J a_ v RANCHO SECO UNIT 1 TECHNICAL SPEClflCATIONS Surveillance Stimdard', 4.11 AUXlLIARY AND Sf>ENT FUEL CUILDING FILTER SYSTEf15 Applitahilit_y_ Applies to the Auxiliary Euilding exhaust filter systen and to the Spent fuel Pool Building v. hen irradiatcd fuel is being moved or is stored in it. Obj ec t i vc To verify that the Auxiliary ruilding exhaust filter system and -omponents will t.e able to perforn their design functions. Surveillance Pecuicerents 4.11.1 When i rradiat ed f uel wiiich has decayed l e <- s than 90 days is in t '.e spent fuel ' to rage pool : A. The spent fuel storage pool bui!J: exraus ventilation systeu m < hall be verified to be operating ' tith all spent fuel building doors closed (e.scepting internittent nersonnel use) prior to fuel R hours during either fuel " m ent n ave. cn t and at least once per within tht spent fuel storage pool or crane operation with loads over the spent fuel storage pool. 4.11.2 Proper Opc rat ion of vent ilat ion systcm shall be verified: A. At least once pe r r,on a by observing flou throuch the operating HEPA fiiter and charcoal ad<orLer train and verifying that the t ra in operate-uith 4 inches <la t e r Guag; pressure drop acros< the cv,bined HEPA and Charcoal filter bank < B. At least once per refueling interval, or once every 18 ranth'. whic hever occurs first, or af t er each part ial or co~plet e replace-ment of the HEP A f i l t e r ban!. or char c oal adsorber hank, or following painting, ' ire, or chemical release in the operatinq air,takeup systen, by: 1. Veri f ying that the cha rcoal adsoriers remove 299 percent <> f halogenated hydrocarben refrigeiant test gas when they are a tested in place in accordance with ANSI N510 ohile operating the filter train at, flow rate not excec ding 43,400 c fm + 10 percent. 2. Ve.- i f y i n g that the HEPA filter banks remove 2995 of the DOP uhen they are tested in place in accordance with ANSI.7510 while operating the f il t er t rain at a flo rate not exceeding 43,400 cin i 107 Proposed Anendnent No. 3? Rev. 3 4-42a fn297 RANCHO SECO UNIT I TECHNIC /R S P E C i f' I C AT I ONS Surveillance Requirements (Continued) Surveillance Standards 4.11.2 B. 3. Verifying that with the Auxiliary Building exhaust system a flow rate not exceeding 43,400 cfm i 10 operating at percent and exhausting through the HrPA filters and charcoal adsorbers, to the facility vent, not exceeding 10,800 cfu + 10 percent exhaust from the spent fuel pool area while providing a negative pressure in the spent fuel building 0.01 inches W.C. 4. Verifying within 31 days after re oval that a laboratory anclysis of a carbon sample f rce at locst one test canister or carbon sample removed fro, one of the charcoal adsorbers deronstrates a removal efficiency of 1901 for radioactive methyl iodide when the sample is tested in accordance with ANSI N509 (30 C, 951 R.H.), The carbon samples not obtained .om test canisters shall be prepared by either: (a) Eraptying one entire bed fron a recoved adsorber tray, mixinn the adsorbent thoroughly, and obtaining samples at least two inches in d:a~eter and uith a length equal to the thicknes' of the bed or, (b) Erptying a longitudinal sample from an adsorber tray, rrising the adsorbent thoroughly, and obtaining samples
- v. least two inches in diancier and with a length equal to the thickness of the bed.
C. Verify that the air distribution aeross the adsorber section is un i forr i, per ANSI N510, folio,ving original installation, c.od i f i - cation or najor repair. D. Demonstrated operable after evety 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of charcoal adsorber operation byl 1. Verifying within 31 days after reroval that a laboratory analysis of a carbon sample fre, at le7st one test canister or carbon sample renoved from one of the charcoal adsorbers dercon <, t ra t e s a renoval efficiency of 190? for radioactive rne t hy l iodide when the sample is tested in accordance with ANSI m;09 (30oC, 95L R.H.). The carbon <.a,p l e t not obtained from test canisters shall be pr epared by ei t her (a) Er:ptying one ent ire bed f rc a rc:'oved adsorber tray, mixing the adsorbent thoroughly and obtaining samples at least tua inches in diareter and with a length equal to the thickness of the bed. (b) Er ptying a longitudinal sarple from an adsorber tray, mixing the adsorbent thoroughly, and obtaining sanples at least tua incher in diar'eter and wi th a length equal to the thickness of the bed. 2. After reinstallation of the sanpled adsorber tray per D.1: (a) Verify that the charcoal adsorber-removed 1990 of a halogenated hydrocarbon refrigerant test gas, hen thcy are tested in place in'accordance with /NSI N910 while operating the tiller train at a flow rate not exceeding 43,400 cfm i 10 percent. Proposed Amendment No. 32 Rev. 3 4-h2bj .f - RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Surveillance Standards Surveil 1ance Req u i r eme r.t s (Continued) 4.11.2 D. 2. (b) Verify that the HEPA filter bank removes >992 of the DOP uhen tested in place in accordance uiih ANSI N510 while operating the filter train at a flos rate not exceeding 43,400 cfn + 107. Bases The Auxiliary Buildinq exhaust system consists of two full capacity units con wn plenum, draw the air through HEPA and arranged to take suction frori r
- harcoal filter banks and discharge it into the plant vent.
Only one unit is operated at a time, illoaing the other to be serviced or held in reserve. This system draws all of the potentiall'/ radio 7ctively contaminated air in the piant, external to the Peactor Building, through it. The following major areas are served: 1) Spent fuel Building 2) Radio-Chemical Lab Hoods and service Area 3) Radaaste Area 4) Waste Gas Discharge 5) Condtnser Air Ejcctor Exhaust O Various instrumentation and Sampling Di sc harges While providing service to these areas the fil t ers pr ovide a minir,ua DF of 10 for radioactive i od i rm and a DF of 100 for particulate matter which may be releasN in the foilowing: 1) Letdown Line rupture outside (Fe Rnactor Building 2) Post LOCA Decay Heat Rcmova! Leakage 3) Dropped Fuel Assembly in Spent Fuel Poal 4) OTSG Tube Rupture 5) tiakeup Tank Rupture Releases of radioactive materials, and the resultinq dosane from these accidents, are besed on the raximum flot rate from the plant vent. Reduced flow rates are conservative as to the effect of plant releases. Shutdoun of the (ntire system in reponse to a specific occurrence is likewise allouable at the 'erator's discrt tion. The negative pressure req u i r e: :e n t f"r the S;,e n t Fuel ilding is to ensure that all potential releases of radioact ive.uterial are d r a.u n into the exhaust systen, filtered, and renitored prior to release In place leakage testing of the filters de"onstrates their integrity anJ the DF of the HLPA hank. The laboratory testian of charcoal will demonstrate the suitability for a bank to rer in in service as wil as provide an estinate of its re:aining service life The testing required after painting, fire or chemical release, is not to be interpreted to incluJe r:inor touch up painting, lighted cigarettes, house-keeping chenical s and deters;ent t, or other sinilar act is i t ies con on to the normal rootine Refueling interval testing will verify the rethyl iodide rermal ef Ticiency of the charcoal anj the arount of leakas past the charcoal and absolute filtert are at least equal to the design values. The charcoal <Jsorber effi-cicncy acceptance criteria is set sinnificantly higher than rc< ired so as to assure a DF of 10 uill be availaole to the next test interval, P roposed Amendraen t No. 32 Rev 3 ') " I,,) b .,,. O 4-h?c i ) J 1-. p s PA?1CHO SECO Uti!T 1 lECHtllCAL SPECIFICATIO!JS Survei ' i mce S tandards 4.12 REAC f 0R f:UI LDING [Mf PCLt,'CY FILTERING SYSTEM Appiicahi1ity Applies to t es t i ng Reac tor L'u i l d i ng Erze rgency a i r filters. _Ob j e c t i _v_e To verify that the React or I;uilding cuergency ai r filters will perforn their design function. SurveilIance Requ i rr : nt< h.12.I The Reac tor Pui1 ding Er ergency El1 t c ring Syst em shalI be demonstrated OPLRALLE: A. OPERABILITY of the f ans and at soci at ed cooling < yu i p'.en t is den ons t rat ed in Technical Specification 4.5.2. It At least once p"r refueling interval, or once every 18 n on t hs, whichever occur' first, or after each partial or co: plete replace-rent of the UEFA fiIter bank or charrcal adsorber bo ni., or follouing paintinn, fire, or cheoical release in the operating air nukeup syste by. (1) Veri f ying wi t hin 31 day-after r(raval that a laboratory analysi< of a carbon <e ple froo either at least on' test canister or carLon < ample r e: uved tron one of the charcoal rc:'o va l e f f i c i ency o f 185 for adsorbert de: tn trates a radioactiv nethyl iodid<
- t. hen the v ple is te.ted in accordance si t h A!!S I N503 (l30 C, 95 R.H.).
The carbon sa ples shall be prepaied by either (a) Euptying one enti bcd fro,a re'mved adsorber tray, mixinq the adsorbent thoroughly, and obtaining sarplcs at least two inche, in die ter and with a length e plal to tht thickne,3 of the bed. (b) Eiplyinq a longitudinal sa p l. from an adsorber tray, nixing the adsorbent thorouchly, and obtaining samples at least tua inches in dia: ?t t r and with a length equal to the thickness of the bed. (2) Verifying a filter train flow rat. of 40,000 cfn + 10 dur i n<; sy', ten o;,e ra t ion when tested in accord.mce wi t h AIJS I USIO. C. Verify that the air distribution across the adsorier section is uniform, per ANSI N510, fo!lo.eing original installotion, rodifi-cation, or major repair. Proposed Avendeent No. 32 Rev. 3 4-hja '}s~) J~Ty. h, -) , u RANCHO SECO UNIT 1 TECHNICAL SPEClflCATIONS Surveillance Standards Surveil 8 ance Pequirements (Continued) 4.12.1 D. Demonstrate'! operable after every 720 hours of charcoal adsorber operation by: (1) Verifying within 31 days after rc oval that a laboratory analysis of a carbon sanple from either at least one test carister or carbon s...ple remo'.ud from one of the charcoal ren' oval c f f ic iency of ;85? for adsorbers dei ;ons t ra t e s a raJioactive rae t hy l iodide when the sa ple i' tested in actordance uith ANSI N509 (l30"E, 95 R.H.). The carbon samples eot obtained from test canisters shall 1,e prepared by either: (a) Erptying one entire bed fro-a cer:ovt d a+,o r tm r tray, raixing the adsorbent t hor oughly and obtainitu: scp l e <, at least tuo inche< in dia""ter and wit h a l ent;t h equa l to the thickness of the bed-(b) fr ptyinq a longitudinal .ple from an adsorber tray, nixing the a d <. o r b < n t thoroughly and obtaininq .rpic< at leant tuo irc he s in di, >te and with a length equal to the thickness of the I:ed f'a s e r The l' c c t o r Bu i l d ins en e rger cy filter < are charc m l < horber-used por i LOCA to .nt a t r osphe re. In this application credit was res>w iodine fro > the Contain: talen for 85 iedine rerma l e f f ic i ency. In place fiiter itakm;e testinq, uith refrigerant av, per ANS' N510, is not re-quired for recirculating s /s t e: located within reactor containient as limu a t the adsorte t i-a: pl. f and tested per AN;l N509 a< dt 'cribed above. Operability is ad quately de::anntrated in Technical Spec i f ic a t ion 4.5.2. The testinq required after piinting, fire or cheoicol release, is not to 1:e interpreted to includ. oinor touch-up painting. liqhted cigarettes, housekeeping che icols and d.tergents, or other siriilar activities c o:. non to the no r r 'a l routine Proposed A>endment No. 32 Rev. 3 4-43b 7 7-, r )/i w RANCHO SECO UNIT I TECHNICAL SPECIFICATIONS Surveillance Standards 4.!9 AUXIi.l ARY BUILDING GRADE AND l'EZ7/JJINE L EVEL FILTER S/ STEM Applicability Applies to the Auxiliary Cuilding exhaust filter ; y s t er, which serves the ventilation equipn rt room at the mezzanine level and the grade ievel areas containing equipr.ent suc h as the r.akeup tank ru c h i r:e shop and drurm ng station. Obj ec t i ve To verify that thc Auxiliary Building grade and r ezzanine levels exh wst fillcr systen and its components till be able to perforo their design functions Specification 4.19.1 Proper operation of this exhaust ventilation sfstem shalI be verifled: A. At least once per r:anth by obsc inq flow through the HEPA filter and charcoal ad orber train and serifyir.9 thet the train operates with less than 6 inches water gauge pressure drop acros< the cont >ined HEPA and Charcoal f i l t e r bank:, l. Air flou rate through th filtt train shali be adj usted to r:a i n t a i r. 19,500 cf, _ 10 B. At least once per refueling interval, or once every 18 r ont hs, whichever occurs first, or :.fter each partial or coTplet replace.ent of hEPA filter nank or -harcoal adsorber bank, or follo.;ing painting, fire, or che~ical release in th. operating ai r rakeup system, by: 1. Verifying that the ch7rcoal ad3orhers res:ove 399.' of a halogenated hydrocarbon refrieerant test gar, when they are tested in place in accordance uith ANSI N510 while operating the filter train at a fle. rate of 19,500 cfm +10' 2. Verifyinc, that the hEFA filter banks rer:oved '991 of the DOP when t hey are tested in place in accordanie '/ith ANSI h510 while operating the filter train at a floa rate of 19,500 c fri + 10 3 Verifying within 31 days af ter r er: ova l, that a lab analysic cf a carbon sa" ale frou at least one test canister or carton wr :p l e rer:oved f ro-one of the c ha rcoa l adsorbers demonstrate, a removal efficiency of 190- for iadioactive c'e t hy l iodid, when the sacale is tested in accordance with AN51N509 (30"C 95 R.H.). The carbon sa pies not obtained from te t canisters shall be prepared frou either P roposed A; :endr<e n t No. 3? Re-3 by PANCHO SECO UNIT 1 TEChMICAl SPECIFICATIONS Surveillance Standa-ds Spet i fit a t ion (Continued) le.19.1 B. 3 a. Er pty ing one entire bed frcm a removed adsorber tray, i t i p, i n g the..dsorbent thoroughly and obti inq so ples at least 2 inches in diamete r wi th a length aqual to the f liickness of t h( bed, or b. Einptyinq a lono i t udi na l sarap ie from an adsortwr tray, raixing the ad so r l:e r thoroughly, and obtaining sa~ p l e' at least 2 inches in dia eter with a length equal to the thickness of t'n bed. C. Verify that the air distribution across the filtii hank, is uniforn pei ANSI N510 follo. zing origirul installation, ioodifi-catien or repair D. Denons t. a t ed ope rab i c after every 720 hours of charcoal adso b<r operation. 1. Verifyino within 31 day < after ret oval that a laboratory analysis of a carbon ci, : 1.- fro:, at least one t. ,1 cani s t c r or car!m ple re ovid fro-one of the charcoal adsorier< deronstrate' a rernval e f f ic ienc y of 90? for radicac t ivt r.e t hy i iodid, when the sample is tested in accordance with ANSI N503 (30"C, 95 R. I', ). T ht cart on sample-not obtained f r or-test canister < whall be prepared from either: Eoiptying one entire bed fro" a re:oved adsorber tray, a. nixing the ad<orhent thoroughl 3 and obtaining sarple r at least 2 inches in dia eter and, tith a length equal to the thickne s cf th l.ed, or e b. E r'p t y i ng a lonqitudial sir p l e fro,an adsorber tray mixing t h. adsorber t horoughly and obt a i ni ng samples at least 2 i nc t.e< in dio ter with a length enual to the thickness of the bed. 2. I f an adsorber tray it removed in obtaining the charccal sarple r,er D.l: a. Verify that the charcoal adsorhers remove 799' of a halogensted hydrocarlon refrigerant test ga< uhen they are tested in place in accordance with ANSI N510 schile operating the filter train at a flow rate of 19,500 cfn _1 0 '. + Proposed A# endment No. 3.' nev. 3 D 't J J.,
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RANCHO SECO UNIT I TECHNICAL SPECIFICATIONS SurveiiIcnce 5tandards Specificatinn (Continued) 4.19.1 E. If at any time the Auxiliary Building Grade and Mezzanine Levels filter System is determined to be inoperable, continued reactor operation, at p o..e., is alto.>able only if the fans supplying the served areas are shut d.cn and the exhaust flou path closed off. Bases This unit serves tuo areas of the Auxiliary C u i l d i n t;. A. 14,500 cfn is drar:n fron grade level. This area contains the solid rad-uaste dru :i n g station, hot iachine chap, Rd.eup Tank, varinas rad u,ste filters and de,ineralizers, and access openings to the Auxi1iary BuiIding bast ' ent, in addition to accu ulated cont < ;inated equipment and..a t er i a l s in.a i t i ng processirg. B. 5,000 c f r' is d ra, 'n from the cast end of the +20-foot ventilation equip ant r o ca. This area contair,< no direct sourc e of radio-active r-torials other thaa thos. passing Scout,h thc other ventilation equip-nt. T L.e s e all contain f !ters and operate at less than atr mpheric prt'sure, except for the filtered discharge, Thit volu~e of air is exhaested strictly for ventilotion purposes and i: not providing hazard; control, nor is it assuted in any safety analysis. The n ( d for the aLove areas to be exhausted, f i l t e r( d, and r, on i t o red, is strictly based upon the potentia' for rad ioac t ive r 4a ter ia l < to be present in the ventilated space at grade level. A specific design basis accident, with its cc.panica snu rr, tero, has not bcen identified, although a Makeup Tank ruptun, as considered for the Auxiliary and Spent Fuel Building Exhaust Fi'tci Sym - :, i-a likely candidate. Suf fict to state that it could be no greatir t ion that u :, e d in the desic" of the imiliary Euilding Exh ms t Sp t e~, A-542, which providt full flou HEPA and Ch acoal filterina of building air piior to discharge to the plant vent. Therefore, this unit is to oc previded uith -ii ti lar filters and operated to sirailar leakage and re: oval "f f iciency requ i r e: ants. Reactor operation with this syst(m ino e ra b l e is allo,alle if steps are taken c to assure that any relea,e of radioactive raterials wou l d be r.on i t o r ed. Shutdc..n of the area supply fans while closino off the exhaust flou path uill provide thir assurance since the Auxiliary Fuilding Exhaust Syste exhausts the a dj a c en t arcas and thus provides the requ i red r'an i t or i ng. The t e s t i r.q required after painting, fire or cheuical i c t eme, is not to be interpreted to include minor touch up painting, lichted cigar'tres, ho u s e k e e;) i n g cher'icals and detergents, or other s i ra i l a r a c t i v i t i e s s o-ao to the nornal routine P roposed Amend: ent No. 32 f'ev. 3 )q4( 'T d 's}}