ML11221A301

521- R326C B&W Tech Cross Training - Chapter 16 Davis-Besse Loss of All Feedwater

ML11221A301
Person / Time
Site:	Davis Besse
Issue date:	08/01/2011
From:	NRC/HR/ADHRTD/RTTB-PWR
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Download: ML11221A301 (21)

Text

Davis-Besse Loss of All Feedwater Chapter 16.0 B&W Cross-Training Cross Training Course R-326C 1

OBJECTIVES

1. List the indications of a Loss of Heat Transfer event.

2. Explain what operator actions and equipment failures led to the Loss of Heat Transfer event at Davis-Besse.

3. Explain the protection provided in an event that exceeds the design bases of the unit.

4. Describe how the Feed and Bleed method of core cooling is used to remove decay heat following a reactor trip.

5. State why an operator/supervisor may be reluctant to use this method of decay heat removal.

Appendix - Sequence of Events Appendix - Sequence of Events Appendix - Sequence of Events Appendix - Sequence of Events

• Appendix - Sequence of Events Appendix - Sequence of Events Appendix - Sequence of Events Davis-Besse NSSS Fig 16 Fig. 16-1 1

Main Steam System (Fig. 16-2)

Main Feedwater System (Fig. 16-3)

Auxiliary Feedwater System (Fig. 16-4)

Emergency Core Cooling Systems (Fig. 16-5)

Steam and Feed Rupture Control System Logic (Fig. 16-6)

Reactor Coolant System and Pressure Response (Fig. 16-7)

Number One Steam Generator Parameters (Fig. 16-8)

Number Two Steam Generator Parameters (Fig. 16-9)

Trip Throttle Valve Fig 16 Fig. 16-10 10

Dominant Core Vulnerability Sequence Event Tree Fig 16-11 Fig. 16 11

Dominant Core Damage Sequence Event Tree Fig. 16-12