ML20028D500
| ML20028D500 | |
| Person / Time | |
|---|---|
| Issue date: | 11/22/1982 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20027A678 | List:
|
| References | |
| FOIA-82-543 NUDOCS 8301190204 | |
| Download: ML20028D500 (10) | |
Text
4 GENERAL OVERVIEW 0F FEED AND BLEED CAPABILITY FOR OPERATING PLANTS TYPE 1.
PLANTS WHICH HAVE HIGH PRESSURE ECCS TO FEED AND BLEED WITH DEPRESSURIZING TYPE 2.
PLANTS WHICH HAVE SUFFICIENT PORV CAPACITY TO DEPRESSURIZE TO FEED AND BLEED.
A)
Tl10SE WITH HIGH PRESSURE ECCS B)
THOSE WITH LOW PRESSURE ECCS TYPE 3.
PLANTS WillCH DO NOT HAVE SUFFICIENT E
PORV CAPACITY TO DEPRESSURIZE AND g
WHICH llAVE ONLY LOW PRESSURE ECCS (N0 FEED AND BLEED CAPABILITY)
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FEED & BLEED ANALYSES BY THE INDUSTRY B&W
" SYSTEM RESPONSE TO TOTAL LOSS OF SG HEAT SINK", B&W DOCUMENT NUMBER 86-1103585-00, AUGUST 7, 1979 WESTINGl100SE
" LOSS OF FEEDWATER INDUCED LOSS OF COOLANT ACCIDENT" WCAP-9744, MAY 1980 CL
" REVIEW 0F SMALL BREAK TRANSIENTS IN COMBUSTION ENGINEERING NSSS, CEN-114-NP, JULY 1979 m
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TYPE 1 PLANT CORE COOLING REQUIREMENTS OPERATOR MUST MANUALLY ACTUATE HPI HPI FLOW 0F APPR0XIMATELY 40 LBS/HR. Mw PREVENTS CORE UNC0VERY REACTOR SYSTEM WATER LEVEL DROPS INTO UPPER PLENUM BUT CORE IS NOT UNC0VERED.
CORE IS COOLED BY BOILING.
' STEAM EXITS THROUGH PRESSURIZER VALVES.
PRESSURIZER RELIEF OR SAFETY VALVE CAPACITY OF APPR0XIMATELY 40 LB/HR. Mw REQUIRED
1 B&W TYPE 1 OPERATING PLANTS B&W PLANTS WITH HIGH HEAD HPI HAVE INJECTION CAPACITY 0F 46.8 LB/HR. Mw AT THE SAFETY VALVE SETPOINT WITH ONE ECCS TRAIN.
B&W ANALYSIS INDICATES THAT THE FOLLOWING PLANTS CAN BE COOLED BY TYPE 1 FEED AND BLEED.
ANO-1 CR-3 OCONEE RANCHO SECO TMI-1 l
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WESTINGHOUSE AND C-E TYPE 1 OPERATING PLANTS WESTINGHOUSE PLANTS WITH llIGH HEAD HPI HAVE INJECTION CAPACITY OF AT LEAST 42.1 LB/HR. Mw AT THE PORV SETPOINT WITH TWO EC'CS TRAINS.
WESTINGHOUSE ANALYSIS INDICATES TilAT THE FOLLOWING PLANTS CAN BE COOLED BY TYPE 1 FEED AND BLEED.
BEAVER VALLEY SALEM D.C,. COOK SAN ON0FRE FARLEY TROJAN HADDAN NECK ZION NORTH ANNA MAINE YANKEE HAS AN HPI CAPACITY OF ABOUT 70 LB/HR. Mw AND CAN PROBABLY BE COOLED BY TYPE l-FEED AND BLEED.
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TYPE 2 PLANT CORE COOLING REQUIREMENTS 4
OPERATOR MANUALLY SCTUATES PORVs BEFORE STEAM GENERATOR DRYOUT.
i AS PLANT IS DEPRESSURIZED ECCS FLOW INCREASES AND PORV MASS FLOW CAPACITY DECREASES.
PORVs MUST HAVE SUFFICIENT CAPACITY TO DEPRESSURIZE THE PLANT S0 THAT ECCS FLOW MATCHES CORE BOIL 0FF.
WESTINGHOUSE PLANTS WITH HIGH HEAD ECCS.MUST DEPRESSURIZE TO ABOUT 1500 est REQUIRING PORV CAPACITY OF 74 LB/HR. Mw IF ONLY ONE ECCS TRAIN IS AVAILABLE.
WESTINGHOUSE AND CE PLANTS WITH ONLY LOW HEAD ECCS MUST DEPRESSURIZE TO ABOUT 1250 PSI REQUIRING PORV CAPACITY OF 114 LB/HR. MwT.
TYPE 2 OPERATING PLANTS (PORVs MANUALLY OPEN)
WESTINGHOUSE PLANTS WITH HIGH PRESSURE ECCS HAVE A PORV CAPACITY OF AT LEAST 105 LB/HR. Mw.
WESTINGHOUSE ANALYSES INDICATE THAT THESE PLANTS ARE ABLE TO COOL THE CORE IN THE FEED AND BLEED MODE WITH ONE ECCS TRAIN.
WESTINGHOUSE ANALYSES INDICATES THAT MOST PLANTS WITH ONLY LOW HEAD ECCS CAN BE COOLED BY FEED AND BLEED.
THESE PLANTS HAVE A MINIMUM PORV CAPACITY OF 139 LB/IIR. Mw.
GINNA POINT BEACH INDIAN POINT PRAIRIE ISLAND KEWAUNEE TURKEY POINT H.B. ROBINSON ANO-2 HAS PRESSURIZER RELIEF CAPACITY OF ABOUT 200 LB/HR. Mw.
FORT CALHOUN HAS A PORV CAPACITY OF 140 1.B/HR. Mw WHICH IS PROBABILY SUFFICIENT FOR FEED AND BLEED.
I TYPE 2 OPERATING PLANTS MARGINAL FEED & BLEED PORVs MANUALLY OPEN C.E. PERFORMED ANALYSIS INDICATING THAT THE FOLLOWING PLANTS COULD BE COOLED BY FEED AND BLEED, BUT ONLY WITH SOME CORE UNC0VERY.
THESE PLANTS IIAVE A PORV CAPACITY OF BETWEEN 113 AND 120 LB/llR. Mw AND ONLY LOW HEAD ECCS CALVERT CLIFFS PALISADES MILLSTONE 2 ST. LUCIE YANKEE R0WE HAS ONE PORV WITH A CAPACITY OF 118 LB/SEC. Mw.
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CORE COOLING REQUIREMENT
SUMMARY
ECCS FLOW PORV OR SV REQUIRED FLOW REQUIRED 1B/HR. Mw 1B/HR. Mw TYPE 1 40 40 (ECCS OPEN PORV OR SV)
TYPE JL 40 74 HIGH ECCS (PORVs MANUALLY OPEN) 1500 PSI 114 LOW ECCS 1250 PSI
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TYPE 3 OPERATING PLANTS
' 0NLY DAVIS BESSE PROBABLY CANNOT BE COOLED BY FEED
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AND BLEED BECAUSE OF INSUFFICIENT PORV CAPACITY T0 i
DEPRESSURIZE BELOW THE ECCS PUMPS SHUT 0FF PRESSURE PORV CAPACITY FOR DAVIS BESSE IS 36/LB. Mw.
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