ML20072J297

Forwards Corrected Pages to Radiological Emergency Exercise Scheduled for 830615

ML20072J297
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/07/1983
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Jay Collins, Jonathan Montgomery NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
P-83205, NUDOCS 8306300059
Download: ML20072J297 (11)

Text

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public Service Company FCdando ve 16805 WCR 19 1/2, Platteville, Colorado 80651

$6 o2G?

June 7, 1983 Fort St. Vrain Unit #1 P-83205 I

Mr. John T. Collins I

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JUN l 3 /983

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Regional Administrator U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 d

Arlington, TX 76012 J

ATTN: Jim Montgomery

SUBJECT:

FOSAVEX 83

REFERENCE:

Letter, Warembourg to Ccilins, dated 5/24/83 (P-83188)

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Dear Mr. Collins:

In our previous transmittal concerning the Fort St.

Vrain Radiological Emergency Exercise scheduled for June 15, 1983, (Reference) a number of minor errors have been identified. None of these errors affects the scenario as a whole.

However, we are including corrections, so that you have the best information available.

Attached to this letter are copies of those pages affected.

Please replace the corresponding pages in our previous transmittal with these corrected copies.

A telecopy of this letter has been i

transmitted directly to James Montgomery of your staff.

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8306300059 830607 PDR ADDCK 05000267 F

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' 'If you have any questions on this matter, please call Chuck Fuller at (303) 785-2223.

Very truly yours, S JY ftire d ru D

Don W. Warembourg

-y' Manager, Nuclear Production Fort St. Vrain Nuclear 1

Generatir.g Station DW/djc Attachment

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FOSAVEX S3 2 hARRATIVE

SUMMARY

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"i a1T,.= j The initiating event ir a fire in 48ir volt 3.is N. The loss of

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power to equipment powered' fro:ii this bus, caYT.edr kith " sele'.,ted 2

other items of equipment out-of-service, rafu h in"Ahe tri ping of the Loop 2 helium circulators. A failed iditjD shhdown; seal on circulator ID allows 'c.'cima ry coolant to flofr-4cd ' the ' Ir

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circulatorshaft,through'aleakingoropenvalve(jVy2116-2) the circulator's water turbine, otitlet line into thelgurbine water

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drain tank (TWDT), and inte;@c reantor bui? ding through a relief p.~,

y valve on the turbine watery'drath tank (PV-21u.Tset/at 5 psig).

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The inoperable equipment,' hose select,%ely declared T.2

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out-of-service prior to. and during the / exercise, and those e

without power,, prevent' the orarators fiera taking actions,tc-I

'+ 6 establish backup isolation fpr-heifailed sh0tduwn static seal.

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Without backup isolation tneleek,is nonisolablb.

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Q) *' k The fire in the 480 VoM bai,is' cause for declaration of a "5ITE'

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AREA EMERGENCY".

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,i 16 the.-rejetoe $uflding at.the start of the A worker wi11 be i

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event, workir.g in a confited sqacy{. Jhe.. worker will trip, injure

, y himself, and knock himsei@ urcenscioM pin his haste to leave the reactor building. Tne woNet will become contaminated.

This injured indi'fidual prov W y o-tha testing of the Fort St, Vrain Medical Emercar.cy Planico~rpjrrig t with FOSAVEX-83.

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Attachment D

5., l' SHIFT SUPERVISOR AND REACTOR OPERATOR'S INITIAL CONDITIONS CR Card,1 T=-10 Minutes y

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Rea: tor power steady at 70% for entire month.

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All thr,ee boiler feed pumps in service.

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' Ann'unciator alarms are up per attached.

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Electrical lineup-per attached.

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Following',,equipmi>nt is out of service:

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a. Bearing water pump' 10 (P-21025) motor removed for

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' Hydraulic pump IC (P-9102X) - low discharge pressure

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wate-removal pump 1A (P-2103) - impeller c.

r'eplacement. '^ t.

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Loop.32' backup ' bearing water - tagged out at V-21458 to repair leak or, PV-2192.

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fe.aBuffer helium recirculator 1C (C-2106) cleared out.

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Stac,k monitors.have the following indications:

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. 30-CPM N RT-7324-2 _. "30 CPM

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10' CPM

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CR Card 4 Attached to T=0 1-7507X (0830) 1 Window 2-4 "Halon Discharge 480 Volt Room" is lit.

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V-75450, V-75451, V-75452, and V-75453 indicate cl os ed.

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C-7534, C-7539, C-7516, and C-7517 indicate tripped.

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CR Card 6 East R0 T=30 Sec (0830) 1.

480V Bus IC Voltage indicates zero volts.

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HS-9225 (Normal 4KV Feed Breaker to 480V Bus IC) indicates tripped.

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Diesci-generato.' 1B indications show that the D/G has started, i

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T=30 Sec East R0 CR Card 7 (0830)

The following major equipment items have tripped orWhe lost power.

backup equipment has started.

P-8401 Aux Boiler Feed P-4202S SW Return 1C C-4106X Main Tower Fan IF P-51075X EHC 1B P-4104 Circ Water Pump 1D P-3106S Cond Pump ID C-8203 Inst. Air Comp IC C-4202X SW Fan

CR Ca rd 8 West R0 T=30 Sec (0830)

The following 1-02B annunciators have alarmed:

1 -1 He Circ 1C Buffer He Flow High-Low 1-2 He Circ 1C Buffer He Return Flow High-Low l-5 He Circ ID Buffer He Flow High-Low 1-6 He Circ 1D Buffer He Return Flew High-Low 2-1 He Circ 1C Brg Wtr Flow High-Low 2-5 He Circ 1D Brg Wtr Flow High-Low f

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CR Card 11 h'est R0 T=30 Sec (0830) 1.

Turbine / Reactor Power have run back to 50% of previous load.

Bearing water flow in Loop 2 indicates zero flow, 2.

t Feedwater flow in loop 2 indicates zero flow.

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CR. Card 12A West R0 T=2 Min or As i

Checked by Operator i

Buffer-mid-buffer indications on circulators a's follows:

C Circulator 0"

D Circulator

+30" A Circulator Normal-for Operating Circ.

l B Circulator Normal for_ Operating Circ.

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CR Card 14B Post on I-14 T=25 Min (0855)

The following monitors are tripped and reading approxi-mately 4-5 mR/hr:

RT-93250-1 FHM Control Room RT-93252-1 East Wall of Fuel Deck RT-93250-14 East Wall of Fuel Deck RT-93252-2 South Stairwell Elevation 4864'