ML20138J098
| ML20138J098 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 10/31/1985 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20138J066 | List: |
| References | |
| NUDOCS 8510290249 | |
| Download: ML20138J098 (8) | |
Text
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Docket No. 50-423 Attachment No. 3 Millstone Nuclear Power Station, Unit No. 3 SPDS Man-in-the-loop Validation Scenarios Y
r510290249 851016 PDR ADOCK 05000423 F
PDR October,1985 L
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SPDS MAN-IN-THE-LOOP VALIDATION SCENARIOS A'
- 4 Inch Cold Leg Break with No High Head Safety Injection
' Steam Line Break Inside Containment with all Main Steam Isolation B
Valves Failing to Close and Main Feedwater Failing to Isolate.
C Small Steam Generator Leak Simultaneous with Loss of Offsite Power and Subsequent Steam Generator Tube Rupture.
Rupture of Two Main Steam Lines Outside Containment with all Main D
Steam Isolation Valves Falling to Close and Main Feedwater Falling to Isolate.
E Anticipated Transient Without Trip with Loss of All Feedwater ar:d
- Subsequent Pressurizer Manway Leak.
Rod Ejection During Startup with Plant Failing to Trip.
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'. x :, ':a SCENARIO A INITIAL CONDITIONS:
100% Power, EOL FAILED EQUIPMENT:
' Charging Pump B out of service Sequencer in Train B out of service FAILED INSTRUMENTS:
PZR' level RCS-P456 failed high RCS Cold Leg C Temp. RCS-T433B failed high SG 2 Level FWS-L528 failed low SG 3 Press. MSS-PS35 failed low INITIATING EVENT:
4 inch cold leg break on loop B SIMULTANEOUS FAILURES:
No high head safety injection CTMT Spray fails to auto actuate Loss of 4160 Bus 34C SUBSEQUENT FAILURES:
None
a SCENARIO B INITIAL CONDITIONS:
100% Power, EOL FAILED EQUIPMENT:
. Charging Pump B out of service FAILED INSTRUMENTS:
SG 3 level FWS-L538 failed high FW to SG3 flow FWS-F530 failed low RCS Pressure RCS-P403 failed high INITIATING EVENT:
Steam Generator 3 steam line break inside CTMT SIMULTANEOUS FAILURES:
All MSIVs fail to close
. Main FW falls to isolate SUBSEQUENT FAILURES:
SG3 Level FWS-L537 fails high i
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i SCENARIO C INITIAL CONDITIONS:
100% Power, EOL; 5% failed fuel FAILED EQUIPMENT:
Diesel General A out for maintenance Charging Pump A out of service FAILED INSTRUMENTATION:
None
.INTIATING EVENTS:
SGI Tube Leak of 5 GPM Loss of Offsite Power SIMULTANEOUS FAILURES:
None SUBSEQUENT FAILURES:
RCS Cold Leg A Temp. RCS-T4138 falls low SGI Tube Rupture of 1 KGPM Diesel Generator B Trips a
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SCENARIO D INITIAL CONDITIONS:
3% Power, BOL FAILED EQUIPMENT:
None FAILED INSTRUMENTS:
None at start of scenario SG 2 Level FWS-L527 drifts to 6% prior to initiating event INITIATING EVENT:
Main Steam Line 2 rupture outside CTMT of SE6LB Main Steam Line 3 rupture outside CTMT of 5E6LB SIMULTANEOUS FAILURES:
MSIVs fail to close Main FW fails to isolate SUBSEQUENT FAILURES:
SGI Level RWS-L519 fails high
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. SCENARIO E INITIAL CONDITIONS:
100% Power, BOL; All rods in FAILED EQUIPMENT:
Charging Pump A out of service FAILED INSTRUMENTS:
None at start of scenario Main FW to SG3 FWS-F330 fails low INITIATING EVENT:
Anticipated Transient Without Trip SIMULTANEOUS FAILURES:
Loss of all Feedwater SUBSEQUENT FAILURES:
PZR Manway leak of 1.3 E5 LB W
o#3 SCENARIO F INITIAL CONDITIONS:
Approx.101 on source range; BOL; Pulling rods manually to startup plant
. FAILED EQUIPMENT:
Steam Dump Setpoint greater than 1090 PSIG FAILED INSTRUMENTS:
None at start of scenario SG 3 pressure MSS-P535 fails to 650 PSIG INITIATING EVENT:
Rod ejection SIMULTANEOUS FAILURES:
None SUBSEQUENT FAILURES:
None e
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