ML20080B987

Emergency Plan Implementing Procedure EP-TSC-7, Reactor Vessel Head Venting Time Calculation

ML20080B987
Person / Time
Site:	Kewaunee
Issue date:	01/12/1984
From:	WISCONSIN PUBLIC SERVICE CORP.
To:
Shared Package
ML111660552	List: ML20080B961 ML20080B972 ML20080B987
References
EP-TSC-7, NUDOCS 8402070346
Download: ML20080B987 (3)

Text

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, . . ' WISCONSIN PUBLlr SERVICE C0RPORATION

. NO. EP-TSC-7 Kewaunce Nuclear Power Plant TITLE: RV Head Venting Time Calculction IhERGENCY PLAN IMPLEMENTING PROCEDURE l PAGE 1 of 3

, DATE: JAN 12109.;

REVIEWE0 BY )X //7;b A '

APPROVED BY

/>l /,W

• 1.0 APPLICABILITY -

This ' procedure provides instructions for determining the maximum allowable venting period of the reactor vessel he,ad when nonconddnsable gases are

.' present in the RCS.

2.0 PRECAUTIONS 2.1 This procedure should be done concurrently with 'E-0-12, ".Postaccident

. Systems Operation" section 4.1, Reactor Vessel Head Vent. '

~

3.0 ' REFERENCES

. 3.1 "Backg^round Information for Westinghouse Emergency Response Guidelines, FR-I.3 -Void in Reactor Vessel". -

( , Rev. LP-BASIC September, 15, 1981.

3.2 "FR-I.3, Response to Voids in Reactor Vessel".

LP-Rev.1, September 1,1983.

3.3 EP-RET-3C, " Post Accident Operation of the High Radiation Sample Room".

4.0 INSTRUCTIONS ,

4.1 Ensure that the containment" hydrogen analyzer has been placed in service per EP-RET-3C. Allow a~ minimum sample purge time of ten minutes.

4.2 All availa'ble containment air circulating equipment should be operating

. to prevent the formation of hydrogen gas pockets and ensure a representative

. sample is obtained. If only one containment dome fan is operating, the sample should be taken from the operating fan discharge.

4.3 Maximum Allowed Venting Time .

4.3.1 Record or determine the following values:

RCS pressure 'psig cntmt. hydrogen conc. .

% ,< max. allowable 37 cntet pressure psig f -

cntmt. abs. pressure (cntmt. press. + 14.7 psi) psia entmt. temperature 'F cntmt. absolute temperture (cntmt. temp. +460 R) R M O 3 . .

F pp -

WESCQfi514 PU3LIC SERVICE CGRPORATION ,

N0. EP-TSC-7 Kewaunee Nuclear Power Plant TI'1 E : RV Head Venting Time Calculation SHERGENCY PLAN 1MPLEMENTING PROCEDURE .

.DATE: JAN 121984 PAGE 2 of 3 -

4.3.2 Calculate containpnt. volume at STP = A (scf)

(cntet. absolute pressure) 492*R A = .l .32E+06 cf , x - 14.7 psia x (cntmt. abs. temperaturc

= -

'scf .

. 4.3.3 Calculate maximum hydrogen volume that can be vented = B (scf) ,

B.= 3% - (cntmt. hydrogen conc.). xA .

= scf

• 4.3.4 Determine hydrogen flow rate as a function of RCS pressure using Fig. TSC-7 =

C (scfm)

C= scfm

. 4.3.5 Calculate maximum venting time:

Maximun venting f.ime =

B/C = min.

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