ML11221A299
| ML11221A299 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 08/01/2011 |
| From: | NRC/HR/ADHRTD/RTTB-PWR |
| To: | |
| References | |
| Download: ML11221A299 (17) | |
Text
Ranco Seco Loss of ICS Power Chapter 15.0 B&W Cross Training Course 1
B&W Cross-Training Course R-326C
OBJECTIVES
- 1. Describe the symptoms of an overcooling transient.
- 2. Explain how the loss of power to the ICS control stations resulted in:
2 control stations resulted in:
- a. An overheating event and
- b. A subsequent overcooling event.
- 3. Describe the effect of operating a multi-stage centrifugal pump without a suction source.
Appendix - Sequence of Events 3
Appendix - Sequence of Events 4
Appendix - Sequence of Events 5
Appendix - Sequence of Events 6
Appendix - Sequence of Events 7
Appendix - Sequence of Events 8
Appendix - Sequence of Events 9
Appendix - Sequence of Events 10
ICS Power Supplies Fig 15-1 11 Fig. 15-1
12 Main Steam System (Fig. 15-2)
MFW reg. valves assume 50% open positions.
MFW block valves close.
13 Main Feedwater System (Fig. 15-3)
14 Auxiliary Feedwater System (Fig. 15-4)
15 High Pressure Injection System (Fig. 15-5)
Dominant Core Vulnerability Sequence Event Tree Fig 15 6 16 Fig. 15-6
Dominant Core Damage Sequence Event Tree Fig. 15-7 17