ML20079Q141

Forwards Addl Info Re NUREG-0737,Items II.F.1.4,II.F.1.5 & II.F.1.6 Concerning Containment Pressure,Water Level & Hydrogen Monitors,Respectively,Per 830106 Request.No Obstructions Would Prevent Hydrogen from Escaping from Core

ML20079Q141
Person / Time
Site:	Oyster Creek
Issue date:	05/06/1983
From:	Fiedler P GENERAL PUBLIC UTILITIES CORP.
To:	Crutchfield D Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM NUDOCS 8305110374
Download: ML20079Q141 (8)

Text

.

GPU Nuclear

!p U

Qf P O. Box 388 n

J Forked River, New Jersey 08731 609-693-6000 Wnter's Direct Dial Number:

May 6, 1983 Mr. Dennis M. Crutchfield Operating Reactors Branch #5 Division of Licensing U.S. Nuclear Regulatory Commission Wa s hi ngt o n, D.C.

20555

Subject:

NUREC - 0737 Items II.F.1.4 Cont ainment Pressure Monitor l

II.F.1.5 containment Water Level Monitor II.F.1.6 Containment Hydrogen Monitor As specified in your correspondence of January 6,1983, we are providir.g you with the additional information requested.

Should you have any further questions please contact Mr. James Knubel, Manager BWR Licensing at (201) 299-2264.

Si nc ere ly,

)

h-91 j

-eter B. Fiedle ice President a n.

Director l

Oyster C eek PBF:jal l

cc:

Regional Administra tor l

Region I O 'l {

h i

U.S. Nuclear Regulatory Commission u

631 Park Avenue l

King of Prussia, PA 19406 j

l l

NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, NJ 08731 8305110374 830506 PDR ADOCK 05000219 P

PDR GPU Nuclear is a part of the General Public Utihties System

a The response to the NRC request for information is presented by items corresponding to the KRC letter.

(2)

II.F.1.4 - Pressure Monitoring System (PMS)

(2a)

The PMS block diagram with important data is given below. The redundant loops are identical, therefore, the following applies to both the loops.

Pre ssure Pre ssure /Leve l Transmitt er Indicating Recorder Manf. Rosemount Manf. Tracor Model 1153AB7 We st roni cs Model:

D4E-1-780-780-000-5-1-10-0 Location:

Rx Bldg. el. 51'3" Control Poom Span Limits:

0-50/0-300 psia N/A I

Time Const:

0.20 secs.

0.352 secs.*

Cal. S pa n:

0-260 psia 0-2 60 psia Post Accident Errors Radiation

~~+ 8.0% URL N/A (Located in mild environ.)

(2.2 x 107 Rads TID)

LOCA/ HELB:

+ (4.5% URL +

N/A (Located in mild environ.)

3.5% cal. span)

Stability:

j; 0.2 5% URL for 6 mos. None Accuracy:

Incl. in LOCA/HELB j;0.5%

• The time constant for Westronics recorder has been computed from the actual trace furnished by the vendor for D4E series recorders.

(2b)

The parameters which describe the uncertainty in the transfer functions of the modules in PMS system, are listed in item (2a) above.

(2c)

The parameters of item (2b) above, are combined to get overall system uncertai nty, using ROOT-SUM-SQUARES (RSS) me thod.

The overall system error is + 12.69238% of the full scale display.

NOTE: The overall system error analysis is performed using the 7 rads transmitter errors reported af ter irradiations to 2.2 x 10 TID and LOCA/HELB exposure to Temperature Pressure conditions shown in the Tempera ture Pressure Profile of Figure 1.

However, the worst case post accident radiation and the maximum temperature at the transmitter location are 6.0 x 105 rads TID @ 10.0 rads /hr and 2230F, re s pec t ive ly. Therefore, the overall PMS error will be much less than the value given above.

. The error analysis for the transmitter location accident conditions could not be performed because the transmitter error information for these conditions is not available.

(2d)

The time constants for both the modules are listed in item (2a) above.

The response time analysis is performed using the method outlined in Mr. Peter S. Kapo's memorandum to Mr. Walter R. Butler, Chief, Containment Systems Branch, DSI dated April 12, 1982.

A computer code was developed and used for the time constant analysis.

A listing of the computer code is included in Appendix A.

The response time analysis is performed assuming both the transmitter and the recorder to be first order systems.

The overall time constant of the PMS is 0.5861.

A copy of the computer run is inclued in Appendix A-1.

(2e)

CPUN has developed their own computer code and the results given in item (2d) above.

(3)

II.F.1.5 - Water Level Monitoring System (WLMS)

(3a)

The WLMS block diagram with important data is given below. The re dundant loops are identical, therefore, the following applies to both the loops.

Level Pre ssure/ Level Transmit t er Indicating Recorder Manf. Rosemount Manf. Tracor Westronics Model 1153DB5 Model:

D4E-1-780 780-005-5-1-10-0 Location:

Rx Bldg El(-)19'6" Control Room Span Limits:

+ (4.5% URL +

N/A (Located in mild environ.)

~

3.5% span)

Cal. Span:

12-204 inches of H O 12-204 inches of H O 2

2 Post Accident Errors Radiation 2.2 x 107 Rads TID

+ 8.0% URL N/A (Located in mild environ.)

LOCA/HELB

-+ (4.5% URL +

N/A (Located in mild environ.)

3.5% span)

Stability j; 0.25% URL for None 6 months Accuracy Incl. LOCA/RELB j;0.5%

. (3b)

The parameters which describe the uncertainty in the transfer functions of the WLMS modules, are listed under item (3a) above.

(3c)

The parameters of item (3b) above, are combined to get overall system uncertainty, using ROUr-SUM-SQUARES (RSS) method.

37.710124% of the full scale display.

The overall system error is +_

I NOTE: The overall system error analysis is performed using the 7 rads transmitter errors reported af ter irradiation to 2.2 x 10 TID and LOCA/RELB exposure to temperature pressure conditions shown in the Temperature Pressure Profile of Figure 1.

However, the worst case post accident radiation and the maximum temperature at the transmitter location are 5.6 x 105 rads TID 0 10 rads /hr and 150 F, respectively. Therefore, the overall WLMS error will be much less than the value given above.

The error analysis for the transmitter location accident conditions could not be performed because the transmitter error information for these conditions is nut available.

(4)

II.F.1.6 - Hydrogen Monitor System (HMS)

(4a)

The HMS block diagram is given below. The redundant loops are identical, therefore, the following applies to both the loops.

SAMPLE LOCAL H /0 REMOTE H /02 2 2 2

POINT ANALYZER PANEL ANALYZER PANEL Lo catio n:

Top of Dry-Rx Bldg El 75'-3" Control Room well dome (4b)

The Hydrogen Monitoring System is procured as a packaged system and error information is furnished by the vendor for the entire system. The system vendor is COMSIP, Inc.

(4c)

The overall system error for the recorders is + 5.0%, for the indicators is.+ 6.0%.

(4d)

There is one sample point for each of the HMS systems. Both the sample points are located on the top part of the drywell dome as indicated in Figure 2.

(4e)

There are no obstructions which would prevent the Hydrogen escaping from the core from reaching the sample points quickly. Due to the fact that Hydrogen is a light gas, the possibility of it accumulating in the top part of the drywell dome is highest. However, the drywell air recirculation fans will always keep the drywell air thoroughly mixed.

l i

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Figure 1 TitiPERATIJRE LOCA/HELB Temperature Pressure Profile

("F) ang FOR ROSEMOUNT SERIES B & D TRANSMITTER

!!5 psig 115 psig 350 60 psig 300 250 77 p3gg 200 3,glL, 176g (30 days) 3 psig 159. g, _,

(60 days) 150 1 psig 150.3 r (90 days) 120 -

4, 100 0 gis19 50 _

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i Figure.2: Hydrogen Monitoring System (HMS) Sample Point Identification.

Appendix A-1

! [TD FIi+ i:Ortr i P! : C h "R'.'7 r

• 1TER T;IF NUMER OF CVIC' r

!" T:;r HSTRUMr>lT. aci' '

7. r

, Pi ';li ' I CUT ChAL L LT IN THE ^~1 PT

'T:Fr! HTT ENTER, TYPE RE rUi4 C, TilO! ti!T Ef TET;'

6 !Nru r'

7 f, = /J P.', ( ( '

)

R Y =,Y

".Y t ? )

PRINT 'CNTER TME TIME CONSTAN TS FOR THE DEVICE 5' 10 PRINT i

ii PRINT ' INPUT SHALL DE IN THE FOPt1 It

= '

?

ETC.'

12 PRIr1T 'THCN HIT ENTER, TYPE RESUME, THCN !!!T ENTER '

1 I!1PUT B 11 TC=ARCAY(N:D)

V 15 C'Pi=CXP(-1)

/

in TCLr0.0 17 FCR Iri,N v

10 FOR J = 1. t1 1? IF (I.CQ.J) CO TO Ci 20 X=TC(I)/(TC(I)-TC(J))

W 21 GO T3 C2

" C1

'(J';

.0 2s GD 10 t2 V

20 C2:Y(J; o*

23 C3:CNDLOCP J

%.e 2 !.

Z=1.0 27 FOR K=i,N 20 Z=Z*Y(M)

L 27 CNDLOOP K

'n A(I)2Z 31 TCL'TCL >TC(I) v 32 CNDiGGP I i

33 TCU=1.2*TCL

• FN'J = 0. G v

35 FNL=0.0 26 FOR I=1.N E.

37 Fill =A(I)*EYP((-TCL)/TC(I))+FNL L

30 FNU=A(I) *EXP( (-TCU)/TC(I))+FNU 37 CNDLOOP I 40 FOR I=1,15

'w 41 TCI =TCL + ( TCU-TCL ) * ( ( FNL-CXP1 ) / ( FNL -FNU ) )

42 FTCI 0.0 43 FOR J=1,N s

44 FTCI=FTCI+A(J)*EXP((-TCI)/TC' D 45 ENDLOOP J

• L.

46 Q=FTCI-EXPi s

47 P= ADS (Q) 40 IF (P.LT.1.nE-6) GC TC C4 4? IF (Q.GT.O.0) GO TO C. 3 k

50 TCL=TCI 96 M W 51 FNL=FTCI b

52 GO TO C6 53 CS:1CUeTCI 54 FNU=FTCI e

55 C6;ENDLCCP I 56 C 4. PRINT

• • TCI* DEFINES TUC '!TRING TIME CDN.7

r

.NI.' "I 57 PRINT J

d}3 PRINT 'AT T!!IS TIf1C CONSTANT POINT'Q PROGRAM LISTING FOR TIME CONSTANT COMPUTATION

SYSTEM VOL 36 JUN 49 JUN Si ELAPSED TIME AVG. PRESS.

MASS FLOW QUALITY

~

I.g s

Appendix A-2 get(tiraecons)

> execute t i rnec ons EXECUTION STARTED ENTER THE NUMBER OF DEVICES IN THE INSTRUMENT LOOP INPUT SHALL BE IN THE FORM N= 9 THEN HIT ENTER, TYPE RESUME

,THEN HIT ENTER INPUT N

> n=2

> resurae ENTER THE TIME CONSTANTS FOR THE DEVICES INPUT SHALL BE IN THE FORM B=?

?

ETC.

THEN HIT ENTER, TYPE RESUME

,THEN HIT ENTER INPUT B

> b=.352,.200

> r es urae "TCI' DEFINES THE STRING TIME CONSTANY AND TCI

.5861

=

1

=

AT THIS TIME CONSTANT POINT Q = -5.1081E-7 MANUAL MODE g

1 l

l Computer Run For PMS Loop Time Constant Computation 1

l l

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4-