ML19290A098
| ML19290A098 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/13/1979 |
| From: | Brooks B BABCOCK & WILCOX CO. |
| To: | Suhrke K BABCOCK & WILCOX CO. |
| References | |
| TM-0951, TM-951, NUDOCS 7910010528 | |
| Download: ML19290A098 (3) | |
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DOCUMENT NO:
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COPY MADE ON OF DOCUMDIT PROVIDED BY METROPOLITAN. EDISON COMPANY. s Supervisor, Docment Control, NRC 8
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jT/ B&W TRAILER 26 TRANSMITTAL #-
W21S TIME 11:0S AM DATE APRIL 13, 1979 SUBJECT INFORMATION R5LATIVE TO 'C0tlTROL ROOM $VACUATIO'N-
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KEN.ELLISON REQUEST APPROVED BY
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POWER' GENERATION GROUP j
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ENGINEERING OPERATIONS MANAGER - K.E.'SUHRKE
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Date 0830 HOURS KEN ELLISON TELECON REGARDING SITE EVACUATION APRIL 13, 1979 gm,..,..........................;...a.
r THIS MEMO IS TO DOCUMENf THE INFORMATI0'N GIVEN TO KkN.ELLISON VIA TELECON AT 0630 ON APRIL 13, 1979.
KEN HAD REQUESTED INPUT ON MINIMUM MAKE-UP FLOW SHOULD TMI BE FORCED INTO CONTINGENCY PROCEDURE C-26 ON SITE EVAUCATION.
PROCEDURE C-26 BASICALLY CALLS
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FOR MINIMUM MAKE-UP FLOW TO SLOWLY TAKE THE RCS TO A SOLID CONDITION WITH DH AS A BACK-UP (AUTOMATICALLf' INITIATE AT AN RCS PRESSURE OF'
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200'PSIG).
THE INFORMATION PASSED ON TO KEN WAS AS FOLLOWS:
INITIAL PRESSURIZER LEVEL OF 200" ASSUMPTIONS:
INITIAL PRESSURIZER TEMPERATURE OF S50 E
.s 19 GPM SEAL INJECTION FLOW 3 GPM SEAL RETURN FLOW (NOTE: C-26 CALLS FOR ISOLATION OF SEAL RETURN BUT LEAVES THE RCP RUNNING SEAL RETURN MUST BE MAINTAINED)
PRESSURIZER C00LDOWN TO 230 F IN APPROXIMATELY
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.14 0 S HOURS ~
2 GPM RCS L'EAKAGE LETOOWN ISOLATED (REQUIRED IN C-26) s GIVEN THESE ASSUMPTIONS, HAND CALCULATIONS SHOWED THE FOLLOWING RESULTS:
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APPROXIMATELY S-GPM MAKE-UP FLOW REQUIRED I
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TO MAKE-UP FOR CONTRACTION VOLUME IN
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- 19 GPM FDL INJECTION FLOW RATE MORE THAN ADEQUATE T,0 ALLOW FOR SEAL RETURN, RCS LEhKAGE, AND CONTRACTION AND STILL TAKE
~ RCS SOLIO IN LESS THAN 13 HOURS..
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CALCULATIONSWERENOTGIVNTOKEtELLISONBUTAREATTAbHEDFOR
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YOUR INFORMATION.
ASSUME:
19 GPM SEAL INJECTION
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3 GPM SEAL RETURN
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2 GPM RCS LEAKAGE PRESSURIZER C00LDOWN.550 F - 230 F IN a
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I 5 HOURS f
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CALCULATE MAKE-UP REQUIRED FOR CONTRACTIM VOLUME (ALL NUMBERS FOR R. WINKS):
- SPECIFIC VOLUME O 550 F =.02176; O 230 F =.01685
- 0 200" PRESSURIZER WATER VOLUME = 825 FT.3
- LBM. WATER 0 550 F = 825 FT.3/.02176 FT.3/LBM = 37,900 LBM.,
- VOLUME 0'230 F = 37,900 LBM. X.01685 FT.3/LBM. = 639 FT.3
- CONTRACTION VOLUME = 825 FT.3 - 639 FT.3 = 186 FT.3
- 186 FT.3 y 7.48 GALLONS /FT.3 = 1400 GALLONS
- 1400 GALLONS /5 HOURS = :i GPM EXCESS MAKE-UP = 19 GPM (SEAL INJECTION).- 3 GPM (SEAL RETURN -
2 GPM (LEAKAGE) - SGPM (CONTRACTION = 9 GPM
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S-2221 141 s
TIME TO GO SOLID:
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- 6730 GALLONS NEEDED TO GO SOLI (FROM 200")
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- 9 GPM X 5 HOURS X 60 MIti/HR = 2700 GALLONS t-
- AFTER 5 HOURS ASSUME NO CONTRACTION (PRESSURIZER @ 230'F)
I THEREFORE,.14 GPM EXCESS
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GALLONS
- 6730 - 2700 =.4030
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- 4030 GALLONS /14 GPM = 288 MINUTES = 5 HOURS
- TOTAL '= 10 HOURS TO GO SOLID l
13 HOURS GIVEN TO KEN ELLISON TO ALLOW FOR USE OF APPROXIMAT.ES.
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