Text

Forwards Detailed Emergency Exercise Scenario Per NRC 820114 Request
	ML20107A063
Person / Time
Site:	Fort Calhoun
Issue date:	10/24/1983
From:	Miller W; OMAHA PUBLIC POWER DISTRICT
To:	Jay Collins; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
	LIC-83-268, NUDOCS 8502190255
	Download: ML20107A063 (22)
	v • d • e

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Omaha Public Power District 1623 Harney Omaha. Nebraska 68102 402/536-4000 October 24, 1983 LIC-83-268

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! 5 Mr. J. T. Collins, Administrator

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U. S. Nuclear Regulatory Commission OCT 2 61983 Region IV 611 Ryan Plaza Drive, Suite 1000 u p,

Arlington, Texas 76011

Reference:

Docket No. 50-285

Dear Mr. Collins:

Detailed Emergency Exercise Scenario As requested by your letter dated January 14, 1982, please find attached the detailed scenario for the Fort Calhoun Station emergency exercise.

Sincerely, w !; h. $ blflL/

W. E. Miller Assistant General Manager Attachments cc: Mr. Patrick J. Breheny Regional Director Federal Emergency Management Agency Region VII l Old Federal Office Building, Room 300 l 911 Walnut Street Kansas City, Missouri 64106

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PDR 45SR4 Employment with Equal Oppmtunny Male. Female

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Initial Conditions

- x>(7 1. A severe ice storm is in progress at the station. Only assigned personnel are at the station. The ice storm is north of a line corresponding to the Washington-Douglas County line. Air travel into Eppley is not effected. Travel from Lincoln to Omaha is not effected. The forecast predicts the storm center to move rapidly to the northeast and it will be replaced by a cold front which will bring clearing conditions.

2. The ice storm has knocked out the 161 KV and 13.8 KV lines due to a downed span in the Blair substation at 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months . The estimated

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time to repair the 161 KV is 15 to 11 hours1.273148e-4 days 0.00306 hours 1.818783e-5 weeks 4.1855e-6 months to replace the span.

The estimated time tB'Yepair Ee 13.8 KV is 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months because of additional damage to transformers in the substation. A major power outage has occurred in the Blair area.

3. A containment pressure release was initiated at 1,502. and the containment pressure is 16.5_ psia.

4 Fort Calhoun is operating at full power using the 345 KV line because the ice storm has caused a grid emergency. Nebraska City has been off the grid because of superheater tube damage caused by a leak followed by steam cutting and pipe whip, and North Omaha No. 5 is undergoing a maintenance outage. Nebraska City expects to be back on line within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months .

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5. An annual maintenance outage is currently underway on one diesel generator (DG-2) and at least 13 hours1.50463e-4 days 0.00361 hours 2.149471e-5 weeks 4.9465e-6 months will be required to restore it to operational status.

6. The PASS is not fully operational and manual drawing of samples is required.

7. Equipment Status:

Charging Pump CH-1A is in service Charging Pump CH-1B is in standby Charging Pump CH-1C is in standby Auxiliary Building Ventilation Fans Running: 3 exhaust 2 supply

8. Weather Conditions:

Windspeed = 5.9 mph (present)

Windspeed = 5.9 mph (previous hour)

Wind Direction = 300*

10 Meter Temp. =- -2.2 *C

-0.3 6 Temp = *C/100m 1

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Initial Conditions (Continued)

'9. A primary to secondary leak of less than 1 gpm is occurring.

10. Unknown to anyone, valve HCV-746B was damaged internally when it was activated to reduce containment pressure. The damage has left a permanent one-inch hole through HCV-746B allowing air to pass through a slightly restricted hole into the vent --

_line.

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This information will not be provided to the Control Room.

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SCENARIO 3

(J Time: 2300 Event: The Committee for the Destruction of Nuclear Energy calls threatening to attack the facility.

Security Guard Cue Card You are currently receiving a phone call from an individual who threatens to lead an attack on Fort Calhoun Station using light weapons. The caller states that the threatened attack is in retaliation for the firing of some of his friends and he wants to make the District pay for its sins. The caller states that an event will take place in less than an hour which will prove he is for real . He identifies himself as a representative of the Committee for the Destruction of Nuclear Energy.

(Calls to local authorities are to be simulated. Additional personnel need not report to the station.)

Expected Response:

An In-plant Security Alert is declared per the Security Plan. /

g: ppm -An Unusual Event is declared per EPIP-0SC-1. /

A Time: g.@ 2310 Event: Explosion in the UF6 storage area.

Security Guard Cue Card An explosion has just occurred in the UF6 storage area. There are no intrusion alarms and no activity has been observed near the perimeter fence.

Control Room Cue Card An explosion is heard which appears to be outside of the plant.

There are no indications of anything in the Control Room that could affect plant safety.

Expected Response:

The UF6 area is checked using EP-38. Plant remains in a Security Alert.

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-Time: 0040 O

V Security Gua d Cue Card The explosion dislodged some of the cylinders, but no cylinders were damaged and no UF6 was observed to be leaking out.

Expected Response:

Iriformation is reported to the Control Room.

Time: 0100 Event: An investigation of the the plant area yields nothing. No evidence is found which would indicate that anyone is within the security area. The Shcriff's Department reports apprehending a suspect.

Security Guard Cue Card The Sheriff's Department reports that an individual was observed making a threatening phone call to Fort Calhoun. The individual has been apprehended. A search of his car revealed explosives . Under questioning he admitted setting explosives at Fort Calhoun Station. The Sheriff's Department feels that the individual is acting alone. Questioning of the suspect is

-vO continuing.

Expected Response:

The Security Force contacts the Control Room. In-plant Security Alert may be terminated. Notification of Unusual Event may be terminated.

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' Time: 0600 .

Event: Seized Rotor occurs with pressure " spike" followed by a rapid g

pressure reduction. The steam bypass valves fail to actuate x properly causing the first bank of steam safeties to lift for approximately 20 seconds.

Control Room Cue Card Reactor trip. Sequence of events shows the trip was caused by low RCS flow. The 86 relays on CB-123 for RC-3C indicate a fault. All off-site A/C power is lost and DG-1 is operating normally. The RCS gross coolant activity meter indicates RCS activity is increasing. The steam bypass system did not open the bypass valves on demand and the first bank of steam safe-ties lifted. The steam bypass valves opened approximately 20 seconds after the demand signal was generated and the first bank of steam safeties did properly reseat.

Expected Response:

Restore off-site A/C power per EP-3 and restart RC pumps RC-3A

- and RC-3B per EP-3 or EP-4. Declare an " Alert" per EPIP-OSC-1.

Time: 0615 Event: Radiation monitors indicate increasing levels of radiation in q the containment.

V Control Room Cue Card Containment area monitors indicate increasing levels of radiation. RCS gross activity monitor is increasing.

Expected Response:

Operator attempts to close valves HCV-746A and HCV-746B to terminate containment pressure reduction.

Time: 0620 (approximate, issued as appropriate)

Event: Status of containment purge valves.

Control Room Cue Card Valve HCV-746A indicates open. Valve HCV-746B indicates closed.

Expected Response:

Containment purge would be terminated. The containment would be properly isolated. Maintenance Order would be written to

(] work on HCV-746A. ,

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Time: Issue as appropriate Event: Investigation of containment purge line downstream of HCV-7468.

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Auxiliary Building Operator and HP Cue Card Area surveys indicate high activity in containment purge line downstream of HCV-746B.

Expected Response:

i Attempt to close manual valve VA-262.

Time: Issue as appropriate Event: Attempt to close VA-262 Aux. Bldg. Operator Cue Card Valve stem twisted off of M-262 when an attempt was made to close it. Valve could not 7e closed.

Expected Response:

1 Start investigation 'of means to stop flow through HCV-7468.

i O Time: as enpropriete.

Event: Operator attempts to enter containment.

Operator Cue Card Once you are inside the PAL, steam is visible through the sight glass in the door into containment.

Expected Response:

Report information to Control Room and the operator does not enter containment.

Time: 0700 Event: Charging is now increasing because a leak has formed in the RCP seal.

Control Room Cue Card Unexplained leakage is now 5 gpm.

Expected Response:

I rOv Implement EP-28.

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.' Time: 0730 Event: The 345 KV line fails due to ice on one of the towers.

Control Room Cue Card Breakers 4 and 5 have opened. Low voltage indicated on all AC buses. Diesel DG-1. starts properly if it was shut down.

906 or TSC Cue Card The 345 KV line has failed due to ice on the line and towers.

At least one span is down. 43rd reports the earliest the span can be restored is at 1500.

Expected Response:

EP-3 is implemented. .

[ Time: Approximately 0800 (as determined by action of Control R I operators)

2) ;j0 I Event: Natural circulation cooldown commences.

k-Expected Response:

f/

v Cooldown commenced using 01-RC-11.

' Time: 0805 4

Event: High radiation is indicated by RM-060.

Control Room Cuv Card RM-060 (I) is now off scale.

Expected Response:

Implement EP-11 and shut down all supply and exhaust fans.

Time: 0915 Event: Outside air temperature is now 40*F and the sky is clearing.

Control Room Cue Card Request shift chemist to draw and analyze an RCS coolant sample for boron concentration.

Expected Response:

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( Request an RCS coolant sample.

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< r Time: 0930 4 -

Is) s Event: Leakage now exceeds charging pump capacity and pressure starts to decrease.

! Expected Response:

i L/' Declare Site Area Emergency per EPIP-0SC-1. Immplement EP-5 if it has not been previously implemented.

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. Time: 0945 Event: Technician drawing a sample of primary coolant has a heart attack and spills coolant on himself as he falls.

Shift Chemist Cue Card You have had a heart attack and reactor coolant has been I- spilled on you.

HP/ Chemist Cue Card 4

Your fellow worker has just had a heart attack and RCS coolant has been spilled on him.

Expected Response:

Rescue Squed should be summoned, i

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Time: 1130 Event: Piston seizure in diesel generator causes loss of all A/C

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power. The diesel catches fire and a worker is injured due to smoke inhalation. The fire is reported out 15 minutes after 4 fire brigade arrives. The other diesel is not damaged.

Control Room Cue Card Low lube oil pressure is indicated on DG-1.

Maintenance Worker You and a companion went to Room 63 after hearing an unusual noise from DG-1. Upon entering the room, a fire erupts. Your companion is overcome by the smoke. You are able to get him out of the room.

Control Room Cue Card Fire alarms indicate fire in Room 63. Deluge is activated in Room 63. DG-1 stops. DC power is still available.

Expected Response:

Declare General Emergency per EPIP-0SC-1. Fort Calhoun Rescue Squad shold be called. The fire brigade should be dispatched.

The Blair Fire Department should be called.

(V~T Control Roor Cue Card When calling the Blair Fire Department, request that they not respond.

Control Room Cue Card When calling the Fort Calhoun Rescue Squad request that they do respond.

Time: Approximately 1200 Event: Fire in Room 63 is out.

Fire Brigade Cue Card Fire is now out.

Expected Response:

Report information to Control Room and resume work on DG-2.

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Time: 1300

-Event: Power restored via diesel repair. Vessel refill commences.

Maintenance Personnel Cue Card DG-2 repair and assembly is now complete.

Expected Response:

Start and load DG-2. Start HPSI and refill the vessel.

Time: 1315 Event: The 161 KV line is now available.

TSC Cue Card 906 and 43rd report that repairs have been completed on the 161 KV lines and it is now available for operation.

Expected Response:

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Restore offsite A/C power to the station.

Time: 1330 0 '

Event: Conteiament reieese is stegned via giu22i no ieexino iine upstream of HCV-746B.

Maintenance Personnel Cue Card Leak from HCV-746B has been stopped.

Expected Response:

Dispatch the Nebraska airplane to confirm that the release has been terminated.

Time: 1500 Event: Nebraska plane confirms the release has been stopped. Event is downgraded to a Site Area Emergency.

E0F Cue Card State of Nebraska reports that the aerial survey confirms that the release has been terminated.

Time: 1530-1ti30

'N' Event: Exercise is terminated upon agreement of all participants (i .e., CPPD, Nebraska, Iowa, participating counties, and NRC).

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METEOROLOGICAL DATA Windspeed Wind Direction oT(*C) Amb. T OC Time 7.9 305 -1.3 -2.2 d 0615 -2.4 0630 8.2 310 -1.3 8.1 312 -1.3 -2.5 0645 -2.5 0700 8.0 315 -1.4 9.1 310 -1.2 -2.3 0715 0730 9.1 300 -1.2 -2.3 9.4 290 -1.2 -2.0 0745 9.8 282 -1.2 -1.8 0800 10.0 290 -1.3 -1.1 0815 1.0 0830- 10.0 285 -1.3 9.6 285 -1.4 1.6 0845 8.2 298 -1.1 3.5 0900 7.6 315 -1.0 4.5 0915 4.4 0930 7.6 300 -1.1 7.2 320 -1.0 4.6 0945 4.8 1000 6.5 310 -1.2

-g i 8 1015 6.4 315 -1.1 4.8

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21

ML20107A063

Text

Reference:

Dear Mr. Collins:

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