ML073321272

Exercise Report, Appendix 4, Exercise Scenario and Timeline, 11/07/2007, Pages 94 Through End

ML073321272
Person / Time
Site:	Comanche Peak
Issue date:	11/07/2007
From:	US Dept of Homeland Security, Federal Emergency Management Agency
To:	Office of Nuclear Reactor Regulation
Shared Package
ML073320782	List: ML073320813 ML073320882 ML073321077 ML073321099 ML073321111 ML073321116 ML073321124 ML073321173 ML073321207 ML073321255 ML073321267 ML073321272
References
Download: ML073321272 (6)

Text

APPENDIX 4 EXERCISE SCENARIO AND TIMELINE This scenario is for Comanche Peak Steam Electric Station Unit 1. The scenario consists of a fire in the Turbine Lube Oil Tank Room. Then a Loss of Coolant Accident in the Reactor Containment, followed by failed fuel. Pressure increases in Containment, followed by a leaking Equipment Hatch seal. The main event is a large break LOCA with a failure of the containment resulting in a release of radioactive material to the environment.

The exercise is scheduled to begin at 7:30 am., Wednesday, August 29, 2007.

METEOROLOGICAL CONDITIONS Temperature is 85 degrees with wind out of 250*, at 10 mph. Temperature will increase to about 95 degrees by the end of the exercise..

EVENT

SUMMARY

A fire is reported in the Turbine Lube Oil Tank Room. The fire warrants the declaration of a NOTIFICATION OF UNUSUAL EVENT (EPP-201 Chart 9).

A 65-gpm reactor coolant system (RCS) leak occurs inside containment. An ALERT should be declared due to RCS leakage > 50 gpm based on EPP-201 Chart 2. Actions commensurate with an ALERT should begin. Operations crew may isolate letdown or may begin a reactor shutdown. If letdown is isolated, LCV-459 closes and LCV-460 partially closes leaving a 20-gpm leak.

A large break loss of coolant accident occurs. A SITE AREA EMERGENCY is warranted due to the LOCA leak and indications of failed fuel based on EPP-201, Chart 2. Expect the ERO to take actions warranted by procedure for a SITE AREA EMERGENCY. Site evacuation will not be demonstrated.

A person in the vicinity of the equipment hatch observes and reports steam coming from the equipment hatch. A GENERAL EMERGENCY is warranted per EPP-201, Chart 2. Expect the ERO to take actions warranted by procedure for a GE and to make the initial protective action recommendation based on plant conditions to be evacuate zone 2A and down wind sectors to 5 miles and shelter downwind sector between 5 and 10 miles.

Terminate the exercise around 1230, 94

I-0 b

m Y

8 c

.I Y

u 2

cr, w

95

I-E 0

z 5 -

m m

m a m

97

v1 W

2 s W

2 2

2 t?

E 0

E 3

?

0 0

m 3

1 99