ML20138J098

SPDS Man-In-The-Loop Validation Scenarios

ML20138J098
Person / Time
Site:	Millstone
Issue date:	10/31/1985
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20138J066	List: A05244, Forwards Response to 850910 Request for Addl Info Re SPDS, Including SPDS Operator Training Program Outline for Man-In-The-Loop Validation & SPDS Man-In-The-Loop Validation Scenarios ML20138J062 ML20138J092 ML20138J098
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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