ML20138C980
| ML20138C980 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/29/1985 |
| From: | TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML20138C971 | List: |
| References | |
| TAC-55782, NUDOCS 8510230122 | |
| Download: ML20138C980 (3) | |
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PLMT SYSTim BASES 3/4.7.1.7 AUX 1LI ARY FEEEEATER SYSTEMS The OPERAEILITY of the auxiliary feed.eter systems ensures that the Reactor Coolant System can be cooled down to less than 280*F frw.
nonnal operating conditions in the event of a total loss of offsite power.
Each steam driven auxiliary feedwater purp is capable of de[1vering a total feedwater flow of 803 spm at a pressure of 1050 psig to the entrance of the steam generators. This capacity is sufficient to ensure that ade:;uate feedi.ater flow is available to remove decay heat and reduce the Reactor Coolant System temperature to less than 2ED'T where the Decay Heat Removal Systa: may be placed into operation.
irepaivr to k au xiliars (<e cl -
Folleu, ira en3 medihcotion s
,v wate,r rp tem pipinS 4 b m % e concj,ns af e sterage <ank %roug h auxiGarg inct peps le -th e.stf am g e n t rede r.r 64 ceuld affect
! M 535hm'.5 ca pa bilMS te delWer water t. S sttorn generarcr$
fencWns a tended ecfd shut dec>n, a flew path verificatim test shi) be perfermed.
W i Etsi mg be conducted in rnodes A,5 or g using auxiliary steam to drive h av lay 3 feed f amfs tubine t, demonstrate +ha+ % Clw Panu Mts n
6em %e condensate stevoge tank to Oe. shom Sencrator.5 Vin aux iliard feed p w ps.
3 /4.7.1.3 CONDENSATE STORAGE FACILITIES The OPERAEILITY of the condensate storage tank with the en64e-mininen meter volume ensures that sufficient meter is available.to maintain the RCS at HOT STANDEY conditions for 13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br /> with steam discharge to atresphere and to cooldown the Reactor Coolant System to less then.280'F in the event of a total loss of offsite power or of the main feedwater system. The contained water volume limit includes an allowance for water not usable because of tank discharge line location or other s
physical characteristics.
3 /4.7.1.4 ACTIVIE The limitations on secondary system specific activity ensure that the resultant offsite radiation dose will be limited to a small fraction of 10 CFR Part 100 timits in the event of a steam line rupture. This dose includes the effects of a coincident 1.0 GPM primary to secondary tube leak.in the steam generator of the affected steam line. These values are consistent with the assur:ptions used in.the safety analyses.
3/4.7.1.5 MAIN STEM LINE ISOLATION VALVES The OPERABILITY of t,he tain steam line isolatiori'va'1ves ensures that'no more than one steam generator will blowdown in the event of a steam line rupture. Thu restriction is required to 1). minisize the (DAVI5-BESSE. UNIT 1 8 3/4 7-2 Amendment No. 58 8510230122 050029 PDR ADOCK 05000346 PDR
.P
s PLANT SYSTEMS AUXILLARY FEE 0 WATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.1.2 Two independent steam generator auxiliary feedwater pumps and associated flow paths shall be OPERABLE.
APPLICABILITY: MODES 1. 2 and 37 ACTION:
a.
With one auxiliary feedwater system inoperable, restore the inoperable system to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
SURVEILLANCE REQUIREMENTS 4.7.1.2 Each auxiliary feedwater system shall be demonstrated OPERABLE:
a.
At least once per 31 days on a STAGGERED TEST BASIS by:
1.
Verifying that each steam turbine driven pump develops a differential pressure of > 1070 psid on recirculation flow when the secondary steam supply pressure is greater than 800 psia, as measured on PI SP 12B for pump 1-1 and PI SP 12A for pump 1-2.
Verifying)that each valve (= nual, power operated or 2.
automatic in the flow path th:t h not 10thed. ::: led Or Othe m he ::c r ed '
pe:it h.. is in its correct gosition.
ANo ciscuAas[LwEs Ni?8r'rIt'sIrfe'kvE s"cM$ETYNMtUll*we"rE'T. Nr's*TsE*I N" *YIka
'I " "
d 8N TN'8 P8 8 'T8 8 " '
b.
At least once per 18 months by:
l.
Verifying that each automatic valve in the flow path actuates to its correct position on an auxiliary feed-water actuation test signal prior ta entering rnode 3 Verifying that each pump starts automatically upon 2.
receiot of an auxiliary feedwater actuation test signal frievh enItn"3 made i.
3.
VERIF1flNs TH AT THERE IT A FLOW PATM SETwitN EACM AUrf t. lamy FKEDWATER PUMP ANO f acM iTE AM GENE R AT0 A SY PUMPlN6 W ATER P ROM THE CoseD5MATF 818A44G TAsak TD TNL ST8 AM 6thstAT0g THE FLDW PATH TO THE STE AM 6sNER Atom SWALL st VERIPIEDest EffMER TTE AM sgusagfot LEVEL CHANGE OR AUKILI ARY FEEDWATE R KArfry coaAas roow Was4AT8eC WERIFIC.ATION OF THE AuslLIARY F8f DWATE A NWsTEM'A FLoint c APACITY 15 NOT AE9pf Rt0.
tr er b entering made3
- Provision *f schon 3..a 6 not oppmoWe,
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'PCA*;T SYSTEMS I
SUWEILLANCE REQUIREMENTS (Continued)
The Auxiliary Feed Pump Turb'ine Steam Generator Level Control c.
Syst8m shall be demonstrated OPERABLE by perforTc.ance of a CMANNEL CHECK at least cnce per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, a CHANNEL FUNCTIONAL TEST at least once per 31 days, and a CHANNEL CALIBRATION at least once per la months.
d.
The Auxiliary Feed P6r.p Suction pressure Interlocks, and Auxiliary Feed Purrp Turbine Inlet Steam Pressure Interlocks sr.all be demonstrated OPERABLE by performance of a CHANNEL FUNCTIONAL TEST at least once per 31 days, and a CHAHhEL CALIBRATION at least once per 18 sionths.
4 AFTER ANY MDDIFIC ATscN OR REPAIR To T*ir AUKILI ARy FEEDWATER 8.
SyJTE M TH AT C OUL D AFFECT THE S yJTE M'$ C APA8 8kfTJ Te DELIV ER WATER To THE STEAM GENERATom, TME AFFECTED Flow PATH ENALL SC DEMONETR ATED AVAIL AB LE As FeLLONS
- j FReM cenDtys h
l LINE, THE ApriLI A R y FEED PUMP $H ALL PUMP WATER Tc THE STE AM T
i GENERATeR ; AND T4E F1,op PATW AVAILABILITY WILL SE VEplFAED SW l
STEAM GENER ATAR LEVEL C HANGE DA AUXILEARY FEEDWATER SAFETf i
GRAtf F'LeW INDic AfterJ.
- 2. lF TNE McDiflCATlDN OR EEPAIR 15 UPJTREAM OF TNE TEET FLOW LlHE p
Tut AustLIARW FEED PUMP JNALL PUMP WATER TmRoueN THE AUxlLIARY TEEDWATER SyJTEM To THE TE ST TLOW LlHE } A ND THE FLOW P.%TM AVAIL ASILIT.y.WlLL BE VERIFIED By FLOW IWDICATlaM IN TWE TEST Thew 4
uME,(ssE Norf sELow)
THif sustvfiLLNcf TEff#dr Dw L Bf PERFostMEP 8%#8t 7b fcE**d e
WATER 515 TEM'5 Fs ow cePAclTV is tiet Af aut AED.
f.
FALLOWlWE EACH EXTENDED COLD KWUTDOWN (> 20 DAyJ IN Most 5),3 y
- 1
- l. VE AIFJ1Ws TM AT THERE IS A FLOW PATW BETWEEN E ACM AustLIARW FEED-W ATE R PUMP AMD E ACH STE AM GEMEA ATD A s y PUMPsNS c eH DEt4 5 ATE" S roe AGE TAwk W ATER To THE E T8 A M 'a sus.R 4reR. T ng.ra o w PATM TO THE ETE AM ER NER ATo R JNALL BE VEREFlED a v EITHER ETE AM GE NER ATeR LEVE L C HANE E 01 AUXILIARY FEEDWATE R. SAFETr GRA0E Flow INDicAvson, VE RIFlC ATION OF THE AUKILEA R V F(EDWATE R s yJTEM's FLOW CAPACITF la NOT A ESulR ED, NOTE ' WNE W CONDuCTINr. TR ETA OF TME AUKILI ARY FE E DWATER S YS TEM IN MODEEIga,AND3 WHICH R E $UIR E LOC AL M A NU AL R E A Ll6MNIENT OT VALVES TH AT M Ak.' THE syJTEM INDPER ABLE, A DEDIC ATED IN DIV ID U A L $ MALL BE 5 6 ATsoHED AT THE VALVE 5 (IN COMMUNICATION I
WITH THE C.ONTRDL RODM) ARLd TO R E STORE THE F A LVE S TO NORM AL K y3 TE M O P E R A E L E L TAT US.
DAVIS-8E55E, UNIT 1 3/4 7-5 Amendment No. 41, 63 I
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