ML20195H943

Proposed Tech Spec Tables 3.3-12 & 4.3-8,allowing More Accurate Measurement of Lower Effluent Discharge Flow Rates

ML20195H943
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	01/12/1988
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20195H933	List: ML20195H930 ML20195H943
References
NUDOCS 8801200425
Download: ML20195H943 (7)

Text

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ATTACHMitNT A 4

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PROPOSED CHANG 5S_,_TO APPENDIX A, TECHNICAL SPECIFICATIONS OF FACILITY l

O9ERATING LICENSES WPF-37, NPF-66, NPF-72, and WPF-75 4

t k s a Byron Station Braidtood Station Revised ragg: 3/4 3-5C Revised Pages: 3/4 3-60 3/4 3-60 3/4 3-62 t

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TABLE 3.3-12 I ;l

-$< RADI0 ACTIVE LIQUID ,FFFLUENT MONITORING INSTRUMENTATION E

, MINIMUM CHANNELS

• c

$ INSTRUMENT OPECABLE ACTION d

y 1. Radioactivity Monitors Providing . Alarm and '-

p Automatic Termination of Release i m _.

Liquid Radwaste Effluent Line (ORE-PR001) 1 31

2. Radioactivity Monitors Providing Alarm

, But Not Providing Automatic Termination of Release

a. Essential Service Water R 1) Unit 1 l <;> a) RCFC 1A and IC Outlet (IRE-PR002) 1 32 b) RCFC IB and ID Outlet (IRE-PR003) 1 32 j 2) Unit 2 I a) RCFC 2A and 2C Outlet (2RE-PR002) 1 32-l b) RCFC 28 and 2D Outlet (2RE-PR003) 1 32

b. Station Blowdown Line'(ORE-PR010) 1 32

! I I 3. Flow Rate Measurement Devices f[

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a. Liquid Radwaste Effluent Line (Loop-WX001) 1 33 i li b. UplJ RaJ waa+c. Efhen+ Loin Floso L. int. (f.por - LOX 630) 1 33 i

e C. 5t on 8 down Line (Loop-CWO32) 1 33

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TABLE 4.3-8 E

g RADI0 ACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION SURVEILLANCE REQUIREMENTS DIGITAL ANALOG CHANNEL CHANNEL E CHANNEL SOURCE CHANNEL OPERATIONAL OPERATIONAL O CHECK CHECK CALIBRATION EST TEST

• INSTRUMENT

1. Radioactivity Monitors Providing

" Alarm and Automatic Termination of Release D P 0:3)# Q(1) N.A.

Liquid Radwaste Effluent Line (ORE-PR001)

2. Radioactivity Monitors Providing Alarm But Not Providing Automatic Termination of Release

$ a. Essential Service *. tater

. 1) Unit I M Q(2) N.A.

a) RCFC 1A and 1C Outlet (IRE-PR002)

D R(3)f Q(2) N.A.

D M R(3) b) RCFC 18 and ID Outlet (IRE-PR003)

2) Unit 2 D M R(3)# Q(2) N.A.

a) RCFC 2A and 2C Outlet (2RE-PR002) D M R(3)# Q(2) N.A.

b) RCFC 28 and 2D Outlet (2RE PR003)

M R(3)# Q(2) N.A.

D j{ b. Station Blowdown Line (ORE-PRO 10) h 3. Flow Rate Measurement Devices

a. Liquid Radwaste Efflu Line (Lo p-WX001) D(4) N.A. R[ N.A. Q

si -

p. n. R g. g, Q (b. Lly<ed Rn wssts. EHlutn+ Low Floso tjeg.(9.uyuq) Q(s4) N.A. R N.A. Q G c.)I. Station Blowdown Line (Loop-CWO32) O(4) ---

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y m TABLE 3.3-12 5$

g RADI0 ACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION 6

o MINIMUM CHANNEAS c- INSTRUMENT OPERABLE

" ACTION d 1. Radioactivity Monitors Providing Alarm and y Automatic Termiaation of Release Liquid Radwaste Effluent Line (ORE-PR001) 1 31

2. Radioactivity Monitors Providing Alarm But Not Providing Automatic Termination of Release o a. Essential Service Water b

w 1) Unit 1 A

o a) RCFC 1A and IC Outlet (IRE-PR002) 1 32 b) RCFC 18 and ID Outlet (IRE-PR003) 1 32

2) Unit 2 a) RCFC 2A and 2C Outlet (2RE-PR002) 1 32 b) RCFC 28 and 20 Outlet (2RE-PR003) 1 32

b. Station Blowdown Line (ORE-PR010) 1 32

3. Flow Rate Measurement Devices

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a. Li 1

b. t..' pas d Adu < quid Radwaste Effluent Line .p- (Loop-WX001)%

WK 636) E+fluen4 Lota Flow L;nt. 33Ct.

c, )f. Station Blowdown Line (Loop-CWO32) 1 33 1 33 J

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TABLE 4.3-8 h RADI0 ACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION SURVEILLANCE REQUIREMENTS "o

!5 DIGITAL ANALOG 8 CHANNEL JHANNEL i

CHANNEL S0JRCE CHANNEL OPERATIONAL OPERATIONAL c INSTRUMENT CHECK CHECK CALIBRATION . TEST TEST 3

d 1. Radioactivity Monitors Providing Alarm and Automatic Termination

p. of Release to Liquid Radwaste Ef fluent Line (0RE-PR001) D P R(3)# Q(1) N.A.

2. Radioactivity Monitors Providing Alarm But Not Providing Automatic Termination of Release

a. Essential Service (later w 1) Uni' 1 1 N.A.

w a) RCFC 1A and IC Outlet (1RE-PR002) D M R(3)# Q(2) b) RCFC IB and 10 Outlet (1RE-PR003) D M R(3)# Q(2) N.A.

2) Unit 2 a) RCFC 2A and 2C Outlet (2RE-PR002) O M R(3)# Q(2) N.A.

b) RCFC 28 and 2D Outlet (2RE-PR003) D M R(3)# Q(2) N.A.

R(3)# Q(2) N.A.

h b. Station Blowdown Line (0RE-PR010) D M p

5l 3. Flow Rate Measurement Devices c! _ --

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a. Liquid Radwaste Effluent Line M (Loop-WX001) . D(4) N.A. R# N.A. Q

b. Li9uad Rad we5+e e.E4 tue n t Lew Flow t *(cey.wygjo) o(q) p.n. g g,g. q C . /. Station 310wdown Line (Loop-CWO32) D(4) N.A. R N.A. Q

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ATTACHMENT B DESCRIPTION AND m7MMARY OF PROPOSED CHANGES.

The proposed changes involve Technical Specification Tables 3.3-12 and 4.3-8 for the Byron and Braidwood Stations. The proposed changes result from a modification to the Liquid Radwaste Effluent Line. This modification installs a 3" diameter bypass line around flow element WX001, that includes a new flow element (WX630) and accompanying flow control / isolation valves in the added line. The purpose of this bypass is to allow accurate measurements of lower effluent discharge flow rates than is currently possible with the originally installed flow metering system. The existing radiation monitor, (ORE-pR001) will continue to provide the high radiation isolation signal for both the existing ar.d the bypass isolation valves. The Technical Specification changes propose to add the new flow element to Tables 3.3-12 and 4.3-8.

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ATTACHMENT C EVALUATION OF SIGNIFICANT HAZARDS CONSIDERATIONS Commonwealth Edison has evaluated this proposed amendment and determined that it involves no significant hazards considerations.

According to 10 CFR 50.92(c), a proposed amendment to an operating license involves no significant hazards considerations if operation of the facility in accordance with the proposed amendment would not:

1) Involve a significant increase in the probability or consequences of an accident previously evaluated; or

2) Create the possibility of a new or different kind of accident from any accident previously evaluated; or

3) Involve a significant reduction in a margin of safety.

The physical changes to the plant involve, the installation of a 3" diameter bypass around t'.ie existing 6" diameter liquid radwaste effluent discharge line flow rate element and flow control / isolation valves. The bypass includes a new flow rate element and flow control /isolttion valves, and is fabricated of the same quality group materials as the original. The purpose of the new bypass is to provide the capability to measure lower flow rates (0 to 150 gpm) than is possible with the existing system (180 to 550 gpm). The existing radiation monitor will not be bypassed, and will have the capability to provide an isolation signal to the isolation valves in both loops. Controlled key (only one key issued at a time) locks on the valve operator switches will assure that only one loop may be used at a time.

The new bypass will perform the same function as the existing liquid radiant effluent discharge lines. The addition of the new flow rate element to the Technical Specifications will ensure system operability and controlled keylocks will assure that only one loop may be used at a time.

Therefore, this added bypass does not increase the probability of an accident previously evaluated.

The consequences of previously evaluated accidents would not be

significantly increased because the operability of the required radwaste system train will not be decreased.

l The operability of the flow rate elements will continue to be verified by performing the related Technical Specification required surveillances. Because the added bypass loop performs the same function and is constructed of the same quality group materials as the existing loop, the l possibility of a new or different kind of accident from any accident previously evaluated is not created.

The added bypass flow element performs the same function as the original monitor, but at a lower flow rate. The same radiation monitor provides isolation signal on high radiation levels to both the original and I the new bypass line isolation valves. Therefore, there is not a significant l reduction in the margin of safety.

Based on the precceding evaluation, Commonwealth Edison believes that the proposed amendment involves no significant hazards considerations.

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