ML20040A973
| ML20040A973 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/06/1980 |
| From: | PACIFIC GAS & ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20040A967 | List: |
| References | |
| EP-OP-38, NUDOCS 8201230022 | |
| Download: ML20040A973 (5) | |
Text
IIEL'.Tm cra,,y,gg;gg EXHIBIT 9
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y gy,,fg pggjfjC OaS and Elcctric Campany NwasER EP OP-38 O
REVislON 2
%]p DEPARTMENT OF NUCLEAR PLANT OPERATIONS DATE 12/6/80 DIABLO CANYON POWER PLANT UNFT NO(S) 1 AND 2 PAGE 1 OF 5
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EMERGENCY OPERAT1f!G PROCEDURE TITLE ANTICIPATED TRANSIENT WITHOUT TRIP (ARJT) 4W Af ? ROVED PLANT MANAGER SCOPE This procedure describes the steps to be tat.an in the event of an ATWT.
An ATWT is a failure of the reactor protection system to trip the rods in l
when one or more reactor trip setpoints have been reached.
SYMPTOMS 1.
Reactor trip point exceeded witnout a reactor trip.
2.
Possible Reactor Protection System activated alam.
1 3.
Possibly the reactor trip alam.
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l 4.
DRPI indicates no rods drop.
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5.
'RCS Hi pressure and level alam.
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6.
NIS continues to read upscale.
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d.yjI S ggg AUTOMATIC ACTIONS
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P;. ( PORV: open.
m 2.
PZR spray valves open.
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PZR safety valves open.
4.
Stea:- dump activated.
OBJECTIVES 1.
Ensure tiie reactor is shutdown.
2.
Provide a heat sink for the react'.r.
DiMEDtCf OPERATOR ACTIONS ACTIONS COMMENTS 1.
Manually trip the reactor.
1.
Use the red handle.
a.
Verify rod botten lights on DPRI.
b.
Verify flIS eacreasing.
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1 Af4D 2 REvls!ON DIABLO CANYON POWER PLANT UNIT NO(S)
DATE 12/6/80 AT1TICIPATED TRAtlSIEf4T WITHOUT TRIP (ATWTi PAGE 7 C[
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..,c COMMENTS ACTI0tlS 2.
This will deenergize the 2.
If the rods fail to drop after Step 1 load centers supplying above, open the 480 Volt LC 13 D and E power to the rod control breakers 52 HD 13 and 52 HE-4 MG sets.
3.
If the BIT is injected and,
3.
If the rods fail to drop after Step 2 the rods remain out of above, close the BIT Recirc. Valves the core, it is important (8807A and B, and 8911), open the BIT inlet and outlet valves (8803A and B, to keep the RCP's in service and maintain hot and 8801A and B) and start both centri-standby conditions.
A fugal charging pumps.
cooldown could allow the reactor to return to criticality.
4.
With the reactor protection 4.
Trip the turbine manually if required.
system failed, the P-4 signal is not present to trip the turbine.
5.
If the turbine fails to trip after
~
Step 4 above, trip the turbine using the trip lever on the turbine pedestal.
6.
Manually start pumps if 6.
Verify all three auxiliary feedwater required.
pumps running.
SUBSEOUENT OPERATOR ACTIONS 1.
Sound the Site Emergency Alarm.
2.
Verify steam dump operating to the 2.
Monitor the heat sink (steam dump) G osely condenser or 10% atmosphere steam after this transieat.
dumps open. Transfer steam dump to the steam pressure made with a 1005 psig setpoint.
3.
RCP seals should be 3.
Ven fy that at least one RCP is observed closely as the operating.
If not, start as many RCS Hi pressure may have as possible.
affected them.
4.
RCS Baron concentration 4.
Check all rod bottom lights on, is increased approximately emergency borate 100 ppm for any 100 ppm with 45 gpm stuck out rod.
boration ficw for approxi-If no rods have inserted, mately 6 to 7 minutes.
emergency borate the RCS until 2000 ppm is achieved.
P." ' 18 E R f.P Or-36 DI ABLO C.: NYC,.
'lER PLANT UNIT NO(S) 1 Afl0 2 REVISION 2
DME 12/6/80 AtlTICTPATED TRAtlSTEtiT WITHOUT TRIP (ATWT)
^
TITLc PAGE OF c
ACTI0?is C0tetEtlTS 5.
Check the gross failed fuel detector for any signs of fuel da;nage.
ti.
Monitor steam genemtor water 6.
The leak may occur as a levels, air ejector off gas anc result of the RCS Hi steam generator blowdown radiation pressure during the monitors for any indication of a transient.
steam genarator tube rupture.
7.
Monitor RCS parameters.
a.
Tavg should return to 547 F.
b.
PZR level should remain above 225.
c.
RCS pressure should remain above 1950 psig.
8.
If pressurizer pressure dect/s below 1900 psig:
~
a.
Verify closed all PORV's (close the a.
The Hi pressure transient backup valve if a PORV is found 3 pen.)
may have stuck open a P0ra.'.
b.
Verify closed the PZR spray valves.
(Close any valve found open.)
If the valve will. not close, tr.ip the associated RCP to prevent further spray.
' 9.
Monitor all SI initiation parameters 9.
With a failure in the (PZR pressure, containment pressure, Reactor Protection etc.) fo_r SI conditions.
If any System, the autcmatic parameter exceeds i.he SI initiation S; initiation is in setpoint, manually initiate safety doubt.
injection and proceed to OP-0.
10.
If manual initiation of SI fails, proceed to OP-0 and perfor a all Immediate Operator Actions Steps usin'; manual control.
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I MUMBER to CP-38 DI ABLO CANYON POWER PLANT UNIT NO(S)
I AND 2 REVislON DATE ANTICIPATED TRANSIENT WITHOUT TRIP (ATNT) 12/6/80 TITLE PAGE a OF c
COMMENTS ACTIONS 11.
If SI is not required, proceed as folicws:
i a.
Verify closed or close feedwater a.
If the P-4 signal failed, control valves when Tavg reaches auto closure of these 554 F.
valves may.not occur.
b.
Transfer the NIS recorder to monitor one IR and one SR channel.
c.
Check the turbine-generator coasting down properly.
- 1) All turbine drain valves open.
2)
The AC bearing oil pump and the high pressure seal oil backup pump start automatically.
- 3) The lift pump starts at about 600 RPM.
4)
The turning gear engages auto-matically at or near zero speed.
d.
Maintain condenser vacuum; if vacuum is lost, use the 107.
atmospheric dump valves to control steam generator pressure.
e.
Establish and maintain hot standby cperation, verify shutdcwn margin per STP R-19 (Shutdona Margi" Calculation),
and adjust RCS Baron concentration if necessary.
f.
If condenser vacuum is lost, check the level in the condensate storage tank to determine how long the unit can be main-tained in hot standby prior to going to cold shutdown.
g.
Prepare to take the plant to cold shutdown conditions.
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NUMBER EP OP-38 DI ABLO CANYON POWER PLANT UNIT NO(S) 1 AND 2 2
Revision t'S DATE 12/6/80 ANT'CIPATED TRANSIENT WITHOUT TRIP /aTWTT TITLE PAGE SOF 5 APPENDIX Z EMERGEiiCY PROCEDURE NOTIFICATION INSTRUCTIONS 1.
Wher, this emergency procedure has been activated and upon direction frcm the shift foreman proceed as follows.
Notify the Plant Superintendent and Supervisor of Operations or their a.
designa'ed alternates.
b.
Designate this event a Site Emergency.
Notify those agencies given in General Appendix 2 of the Emergency Procedures (Notification of Outside Agencies in the Event of an Emergency).
c.
Within one hour notify the NRC.0perations Center using the red phone in the centrol rocm.
Gather sufficient information frcm all sources prior t calling so that the phone call is meaninc#ul.
Notify the NRC that your call is pursuant to 10 CFR Part 50.72, (Notification of Significant Events).
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