ML20004D521

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Draft Emergency Procedures for Reactivity Control Re ATWS
ML20004D521
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 05/28/1981
From: Jolley R
DETROIT EDISON CO.
To:
Shared Package
ML20004D518 List:
References
29.000.08-DRFT, NUDOCS 8106090490
Download: ML20004D521 (21)
v • d • e


Text

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ENRICO FERMI ATOMIC POWER' PLANT UNIT NO. 2 Type: OPERATIONS PROCEDURE - EMERGENCY

Title:

REACTIVITY CONTROL RECORD OF APPROVAL AND CHANCES Prepared by R. Jolley,_

5/28/81 Date Submitted by Section Head Date g'

Recommended by OSRO Chairman Date Recommended by Q/A Engineer Date Approved by Plant Superintendent Date Revision OSRO QA Plant Supt.

No.

Recommsended Date Recommended Date Approved Date 1

2 3

4 5

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8 8106090 %D

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The following is a list of "laters" contained in this procedure. The responsible Section Head furing subsequent revisions will update or remove this "later" sheet.

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Section h

2.3 1

3.6.4 1

3.6.5 2

3.9.1 3

3.9.2(2) 3 l

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29.000.08 INF021AT10D DNLY ^He" I t,

TABLE OF CONTUTS

5811, 1

1.o rurpos...............

2.0 Entry Con'ditions.........

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I 3.0 Operator Actions.......

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,i 1.0 Purpose

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The purpose of this procedure is to provide the guidelines to

'I recognize and mitigste an Anticipated Transient Without Scram (ATWS).

g The effects of an ATWS may require the implementation of other Emergency Operating Procedures.

y 2.0 Entry conditions 2.1 Receipt of a scraa signal, and Reactor power level cannot be determined.

pR 2.2 Receipt of a scraa signal, l

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jg APRM's greater than or equal to 3%,

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2.3 Receipt of a scram signal.

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.,a IBM's inserted and reading greater than (Later)%, 3.5 minutes af ter Reactor scram.

3.0 Operator Action (Optional Checks) 3.1 DEPRESS both Reactor Scram pushbuttons.

3.2 Place the Reactor Mode Switch in the SHUTDOWN position.

3.3 INSERT the IRM detectors.

3.4 Maintain Reactor Water level between 192.5 inches (Level 4) and 201.5 inches (Level 7).

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29.000.08 E

Rev. 0 a

s Page 2 INF0DMATION ONLY

..x (Optional Checks) 3.5 E Any of the following occur throughout the performance of this procedure; 3.5.1 RPV water level less than +171.0" (Level 3), or 3.5.2 Drywell pressure greater than 1.69 PSIC, or 3.5.3 A Reactor isolation which requires,o_r, r

initiates a Reactor Scraa.

THEN ENTER Emergency Operating Procedure

  1. 29.000.01, Level Control, concurrent with this procedure.

3.6 g Any of the following occur throughout the performance of this procedure; 3.6.1 Suppression pool water resperature above 90*F, or t

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3.6.2 o u at.o.,h.re tes,erature above 138'F, or

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3.6.3 Drywell pressure above 1.69 PSIG, or D

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t 3.6.4 Suppression pool water level above (Later) feet, or i

l 3.6.5 Suppression pool water level below l

(Later) feet, THEN ENTER Emergency Operating Procedure f

  1. 29.000.03, Containment Control, concurrent with this procedure.

t 3.7 JF, Main Turbine has tripped, or MSIV's have

closed, THEN TRIP the Reactor Recirculation pumps, i,

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I Proceed to step 3.9.

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(Optional Checks) 3.8 U Main Turbine has not tripped or MSIV's have

closed, TREN CONFIRM or Runback the Reactor Racirculation pumps to minimum flow, and Proceed to Step 3.9.

3.9 MONITOR the Reactor Nuclear Instrumentation.

(Power should be decreasing.)

3.9.1 W

APRM's indicate less than (Later)%

Reactor power, l

i THEN Proceed to Step 3.10.

3.9.2 U

APRM's indicates greater than (Later)Z Reactor power, m.

L THEN INJECT Standby Liquid.

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CAUTION I!&eGDURTICi;Ony Confirm or trip the SLC pumps

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at (Later) inches in the SLC tank.

f a.

Confirm or isolate the Raactor Water Cleanup system.

b.

WHEN SLC.s injecting, THEN Proceed to Step 3.10.

c.

E SLC is not injecting.

THEN Start 2nd SLC pump, and Proceed to Step 3.10.

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L (Optional Checka) 3.10 g SRV's are closed and not cycling, THEN Proceed to Step 3.12.

3.11 IF, SRV's are open or cycling, F

THEN TRIP Reactor Recirculation pumps.

3.11.1 IF SpV's are cloned and not cycling.

THEN Proceed to Step 3.12.

3.11.2 E

SRV's are open and cycling, THEN START RPCI/RCIC in full flow test mode, and a

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Proceed to Step 3.12.

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3.12 Verify Control Rod positions.

I IF, ALL Control Rods are inserted to 3.12.1 F

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position 04 or less.

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THEN ENTER Abnormal Operating Procedure

  1. 20.000.21, haetor Scram.

3.12.2 E

ALL Control Rods are not inserted to position 04 or less, THEN Proceed to Step 3.13.

3.13 Verify all Scram valves are open.

3.13.1 E

All Scram valves are not open, THEN Proceed to step 3.19.

3.13.2 E

ALL Scram valves are open, THEN RESET the Reactor Scram.

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(Optional Checks)

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E Reactor Scran does not

Reset, THEN Proceed to Step 3.18, 2.

JF Reactor Scram is Reset, THEN Verify that the Scram Discharge Volume vents and drain valves open.

a.

E Scram Discharge volume vent and drain valves do not open, THEN Proceed te Step 3.16.

b.

E Scram Discharge volume vent and drain valves

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open, THEN Proceed to Step 3.14.

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3.14 DEPRESS both Reactor SCRAM pu b s.

3.14.1 JF, Inw 'd Control Rod motion has been observed, THEN Verify Control Rod positions 1.

E ALL Control Rod positions t

are at 04 or less, P

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l THEN ENTER Abnormal Operating Procedure #20.006.21, L

Reactor Scram.

2.

JfF ALL Control Rods are not l

at position 04 or less, i

l THEN Return to Step 3.13.2.

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(Optional Checks) 3.14.2 g

Inward Control Rod motion has not been observed, THEN Proceed to step 3.15.

3.15 RESET the Reactor Scram.

3.15.1 IF, Reactor Scram does not Reset, THEN Proceed to Step 3.18.

3.15.2 IF Reactor Scram is Reset, THEN Proceed to Step 3.16.

i 3.16 Scram each withdrawn Control Rod by the use of the individual SCRAM Test Switch.

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3.16.1 IF Inward Control Rod motion has been observed.

THEN Continue the individual Rod Scram antil all Rods are at 04 or less 1

S.E Until no inward Control Rod action is observed.

,N_O Inward Control Rod motion is 3.16.2 WHEN O

observed, THEN Verify Control Rod positions.

1.

E ALL Control Rod positions are at 04 or less, THEN ENTER Abnormal Operating Procedure 20.000.21, Reactor Scram.

2.

E ALL Control Rod positions are not at 04 or leer.

THEN Proceed to Step 3.17.

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29.000.08 INFORMAT100 ONI.Y

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'J (Optional Checks) 3.16.3 g

Invard control Rod motion has not been observed,

1. li TREN Proceed to StepJt; i

E 3.17 RESET Reactor Scram 3.17.1 g

Reactor Scras does not RESET, THEN Proceed to Step 3.18.

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Reactor Scras is RESEI, THEN Rapidly icsert Control Rods by the normal rod insertion method.

1.

IF Inward Control Rod motion is l

,sg observed, THEN Proceed to Step 3.18.

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IF Inward Control Rod action is INFCDG!!T100 GRL'

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THEN Continue to insert Control

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Rods by Rod insertion.

a.

WHEN All Control Rods are at 04 or less.

THEN ENTER Abnormal Operating Procedure #20.000.21 Reactor Scram,

_CA WHEN Control Rod inward motion is no longer observed, THEN Proceed to Step 3.18.

3.10 Attempt to RESET Reactor Scram, and l

START 2nd. CRD pump -

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INCREASE CRD Drive Pressure, I

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Checks) and CLOSE HCU Accumulator Charging Water Valves (113 valve),

and THEN Rapidly insert Control Rods by the Normal Rod insertion method.

3.18.1 JJ{

Invard Control Rod motion is not i

observed, THEN Return to Step 3.13.2.

3.18.2 JF, Inward Control Rod motion is observed, THEN Continue to insert the Control Rod:

by normal Rod insertion method

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WHEN All Control Rods are at j

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Mn yU TREN ENTER Abnormal Operating Procedure #20.000.21 l

Reactor Scram, t

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WHEN Control Rod inward motion is no longer observed, o

i HEN Return to Step 3.13.2.

3.19 OPEN Scram Valves with one of the following methods:

3.19.1 Backup manual scram pushbutton I

L 0,,E 3.19.2 De-energize Scram Solenoids by opening the following breakers:

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1.

C71A-CB.A, located on Relay Roon l

Panel H11-P609, l

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C715-CB1B, located on Relay Room 2.

Fanel H11-P611, e-r

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checks)

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t 3.19.3 Isolate and vent the Scram air i

i header by performing the following:

I 1.

Close F288A, CRD Scras Air Header Filter InIct Valve, and r

I 2.

Close (if open) F289, CRD Scram Air Header Filter Bypass Valve, i

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Bleed off air pressure through l

l the CRD Scram Air Header 5 microhn filter assembly, l

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b US 3.19.4 THEN Return the Scram Solenoid electrical and/or Scram Air System back to __ _,;;;.,,

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normal, 3.19.5, verify all control Rod positions.

1.

E ALL Control Rod positions are 04 or less, THEN ENTER Abnormal Operating Procedure 20.000.21 i

Reactor Scram.

2.

E ALL Control Rod positions are not 04 or less, THEN RETURN to step 3.13.2.

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