ML19221A068
| ML19221A068 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/05/1979 |
| From: | Roy D BABCOCK & WILCOX CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7905190068 | |
| Download: ML19221A068 (4) | |
Text
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TiiE BASCOCK & iilLCOX COMPANY.
Ins tructica #123 POWER GE?iEo,AT10.'l GROUP
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MN cu. a d t D au I
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y-S-Q Did !!iison ee r; a D. H. Ecy. Manager, Engineering DaDart: ^nt ca at, FiI e T:c.
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Date Infarmticq P.: quest by GP!J
' April 5, 1979 l%,~,.~, -
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G?'d rcit:ested an answer to the folicwing questien.
Duesticn-Do we have any altermte rathccs to sugcest for long-tam cooling (other than Natural Circulation or DH Reesval)
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BEi narense-ine felicwing o.ra the citernatives BS is ware of:
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1.
ihtural Circuistica Sciid Uater CT3G 2.
Plug in Decay Haat System
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3.
Pot Caiifng
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4.
Use of !iG.Sats for Oparating F.CP's 01/2 or 2/3 speeds 5.
HPI cr-LPI and relief' to the building CiGijcrw
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vy-N-ransyt to Lee P.cgers, TMI-2" l
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PROCEJURE 70R INITI.\\ TING.4ND MAINTAINING RCS NATUPJd., CIRCULATION FLOif ON LOSS OF RC PUMP-AND FAILUiUI 0? OTHERS TO START As uned Initial Conditions and Pressure 1000 p-ig Pre-requis.ites:
F.C Teraperature 270*F
'.OTSG Levels at 95% Oper' ate Ran:
Stesn Seing Deped to Condensa:
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Standby HPI Fup Lined Up to nuS a
" LFI SysteE Lined Up to Sil5T RC Te yerature ' Tildication on '
/.
Loco A 6 3 Hot Logs e=
1 RC Traperature Indicatica on:
'Inco;; Theracccuples Pressuri;er Level Indication cI
' Scala
. Confim Core Ficed Tank Isolati Valves are Cicsed.
I.L:itations :
31 If the reactor coolant cerc cutlet te:merature (ss neasured by cither tile in' core or hot les te=per-
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atura neasurements} is wit ~nin 100 F of the RCS sat'.:Tatien tc=perature ' (.Scts attached figuic 11, f
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tiie 'procedura for Loss o[all Reactor' Cociant Flow must be initi sted..
-1 2)
Maintain RCS pressure at.1500 psig-or greater ' ~
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while in natural circu16 tion cede, 'ont not to exceed 1300 psig',
Frecedure:
1)
Increase RCS Frassurc to 1500 psig usigg pressurizer heaters.
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Procedure:
2)
U:. isolate the "3" OTSG by opening the nain st:aa (Cont'd) isolation valve, if closed.
Establish stcan ficw to the condenser from "B" OTSG by opening turbine byp.ns valve to condenser.
NOTE:
Steps l' and 2 nay be performed concurrcatly 3)
At the completion of Steps I and 2, cenfira per-' '
sonnel are available to continuously r.onito,r-and record RCS hot leg temperaturas and incore
- thernoccuple temperatures.
NOTE:
Cold Icg tempchtures should remain stable near the initial te=perature:-
hot log femperatures should slowly
. begin to rise.
4)
CLsorve that an equilibrium.pT is established
.in eac'1 Iccu. and carefu117 nonitor core' outlet tenparature.
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