ML20205C544
| ML20205C544 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Haddam Neck, 05000000 |
| Issue date: | 12/13/1985 |
| From: | CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| Shared Package | |
| ML20204H467 | List:
|
| References | |
| EOP-35-FR-H.2, NUDOCS 8810260524 | |
| Download: ML20205C544 (6) | |
Text
g E. J. Mroci 1-1-85 Form Apprcved by St; tion Superintendent Effective Date STATION PROCEDURE COVER SHEET A.
IDENTIFICATION Number E0P 35 FR-H.2 Rev.
1 Title RESPONSE TO STEAM GENERATOR OVERPRESSURE Prepared By J. D. Catlig B.
REVIEW I have reviewed the above procedure and have found it to be satisfactory.
TITLE SIGNATURE DATE DEPARTMENT HEAD I
k
/2 /d C.
UNREVIEWE0 SAFETY QUESTION EVALUATION DOCUMENTATION REQUIRED:
(Significant change in procedure method or scope YES ( )
NO ){
as described in FSAR)
(If yes, document in PORC/SORC meeting minutes)
ENVIRONMENTAL IMPACT (Adverse environmental impact)
YES [ ]
NO M (If yes, document in PORC/SORC meeting minutes)
D.
INTEGRATED SAFETY REVIEW REQUIRED (Affects response of Safety Systems, performance YES [ ]
NO k of safety-related control systems or performance of control systems which may indirectly affect safety system response.)
(If yes, document in PORC/SORC meeting minutes.)
E.
PROCEDURE REQUIRES M ORC REVIEW YES}Q NO ( )
F.
66R260RCAPPROVAL
@ 0RC Meeting Number 3 -85' Mk G.
APPROVAL AND IMPLEMENTATION The attached procedure is hereby approved, and effective on the date below:
V-W V I2 -134_C h
Station /Ser#ce/ Unit Superintendent Effective Date v
SF 301 Rev. 7 p!P2tBan 8"d8lje
S' P
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E0P 35 FR-H.2 Page 1 Rev. 1 i
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RESPONSE TO STEAM GENERATOR OVERPRESSURE i
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Page No.
Eff. Rev.
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RESPONSE TO STEAM GENERATOR OVERPRESSURE E0P 35 FR-il.2 Pag 2 2 Rev. 1
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A.
PURPOSE This procedure provides actions for an overpressure condition affecting any steam generator where pressure has increased above the highest steamline safety valve setpoint.
B.
ENTRY CONDITIONS This procedure was written for Modes 1, 2, 3 and 4.
Using this procedure when not in these modes requires a step by step evaluation to determine if the required action is still applicable to current plant conditions.
This procedure is entered from E0P 35 F-0.3, HEAT SINK Critical Safety Function Status Tree on a YELLOW condition.
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f 7sPon5E To STEAM or.nr.KAf0K OVLKYKL55 UKE EOP 35 FR-H.2 Pega 3 Rev. 1 O
SYtp ACTION /SEPECTED RESPO94SE R8SPONSE NOT OSTAltetO NOTE Throughout this procedure, "affected" refers to any i
SG in which pressure is greater than 1225 psis, i
1 Identify Affected SG(s) a.
Any SG pressure -
a.
Return to procedure and GREATER THAN 1225 ?SIG step in effect.
l 2
Verify FW Isolation To Manually close valves Affected SG(s) a.
Flow control valves -
CLOSED i
b.
Flow control bypass l
valves - CLOSED l
c.
FW trip valves -
CLOSED
[
3 Check Affected SG(s)
Go to E0P 35 FR-H.3, RESPONSE Narrow Range Level -
TO STEAM GENERATOR HIGH LESS THAN 92%
LEVEL, Step 1.
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(77% FOR ADVERSE CONTAINMENT)
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CAUTION If affected SG narrow range level increases to l
greater than 92% (77% for adverse containment),
steam should not be released from the affected SG(s),
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RESPONSE TO STEAM GENERATOR OVERPRESSURE E0P 35 FR-H.2 Pegs 4 Rev. 1 STEP ACTION /EEPECTED RESPONSE RESPONSE NOT OSTMNEO i
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Try To Dump Steam From The Go to Step 6.
Affected SG(s) a.
SG Atmospheric Dumps b.
SG Atmospheric Dump Bypass valves 1
0 c.
Main steamline isolation bypass valves OR
)
d.
Steam supply valves to e
i turbine-driven AW pump I
5 Check Affected SG(s) Pressure a.
Pressure - DECREASING a.
Go to Step 6.
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b.
Pressure - LESS THAN b.
Return to Step 3.
l 1225 PSIG j
1 c.
Control steam release to i
maintain SG pressure less than 1225 PSIG i
d.
Return to procedure and j
step in effect.
j CAUTION I
1 AW flow should remain isolated to affected SG(s) i until a steam release path is established.
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6 Isolate AW Flow To t
i Affected SG(s) l J
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Check RCS Hot Les cool down RCS to less than Temperatures - LESS THAN 539'T (539'T for adverse 539'F (539'T FOR containment) by dimping l
ADVERSE CONTAINMENT) steam from the unaffected SG(s) l
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e RESPONSE TO STEAM UENERATOR QVLKrKr.55 UMP EOF 33 FR-H.Z Paga 3 Rev. 1 tTap ACTIONitXPECTRO RSSPONSE R88POM48 NOT 00TAIN80 8
Continue Attempts To Manually Or Locally Dump Steam From Affected SG(s) a.
SG Atmospheric Dumps b.
SG Atmospheric Dump Bypass valves c.
Main steamline isolation bypass valves d.
Steam supply valves to turbine-driven AFV Pump 9
Return to Procedure And Step In Effect
-FINAL-O CP50641 3 04