ML20012C550
| ML20012C550 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 03/12/1990 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20012C548 | List: |
| References | |
| NUDOCS 9003220190 | |
| Download: ML20012C550 (18) | |
Text
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PROPOSED CHANGES TO APPENDIX'A 1
TECHNICAL' SPECIFICATIONS OF' i
FACILITY OPERATING LICENSIS NPF-37. NPF-66. NPF-72 AND NPF-77'-
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i BYRON SIATION
'])1%IDWOOD STATION li Rev'ised Pages:t3/4 5-4 3/4'5-4.
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i RGENCY CORE COOLING SYSTEMS L
VEILLANCE RE UIREMENTS'
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.6.2 Each ECCS subsystem shall be. demonstrated OPERABLE:
At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that the following valves i
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are in the indicated positions with power to the valve operators y;
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j pi Valve Number Valve Function Valve Position j
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MOV S18806 Suction to the SI Open j
Pumps b
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7 MOV S18835-51 Pump Discharge Open*
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1 To RCS Cold Legs L
MOV SIB 813.
. $1 Pump Recirculation-Open e^
To The RWST p
MOV SIB 809A
.RHR Pump Discharge to Open*
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j' RCS Cold Legs h
l MOV $18809B RHR Pump Discharge to Open*
l RCS Cold Legs 4
MOV'S18840 RHR Pump Discharge to Closed
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RCS Hot Legs
'l MOV SIB 802A SI Pump Discharge to Closed RCS Hot Legs
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MOV S18802B
.51 Pump Discharge to Closed V
RCS Hot Legs m
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At least'once e 1 ays b -
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Vari'yhg th:t the ECCS pipin; is fel' ef etter by[igh points enting the 1) d : c::'M: discharge piping h and
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Verifying that each valve (manual, power-operate, or automat c) in the flow path that is not locked, sealed, or otherwise
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secured in position, is in its correct position, By a visual inspection which verifies that no loose debris (rags, y
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trash, clothing, etc.) is present in the containment which could be y"
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pump suctions during.LOCA conditions.
This visual inspection shall g
be performed:
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p 35 BYRON - UNITS 1 & 2 3/4 5-4
-AMENOMEE NO. 5 (gy
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<s-EMERGENCY CORE COOLING SYSTEMS-SURVEILLANCE REQUIREMENTS g
.4.5.2 Each ECCS subsystem shall be demonstrated OPERABLE:
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At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that' the following valves are in the indicated positions with power to the valve operators i
removed:-
Valve Number Valve Function Valve Position MOV S!8806 Suction to the SI Open Pumps MOV S18835 SI Pump Discharge Open*
To RCS Cold Legs-MOV SI8813 SI Pump Recirculation Open y
To The RWST M0V SI8809A RHR Pump Discharge to Open*
RCS Cold Legs MOV SI88098 RHR Pump Discharge to Open*
RCS Cold Legs MOV SI8840 RHR Pump Discharge to Closed RCS Hot Legs MOV SI8802A SI Pump Discharge to Closed RCS Hot Legs-MOV S188028 SI Pump Discharge to
-Closed RCS Hot Legs b.
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- 1) -Ver4fying-that-the-ECCS-piping-4s-fubl-of-water-by vfenting the f
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Verifying that each valve (manual, power-operated, or automatic)
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in the flow path that is not locked ' sealed, or otherwise
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secured in position, is in its correct position.
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By a. visual inspection which verifies that no loose debris (rags, trash, clothing, etc.) is present in the containment which could be transported to the containment sump and cause restriction of the pump suctions during LOCA conditions. This visual inspection shall be performed:
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L Valves may be realigned for testing pursuant to Specification 4.4.6.2.2.
i BRAIDWOOD - UNITS 1 & 2 3/4 5-4
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r ENCLOSURE TO:
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- ,. APPLICATlpN FOR AMENDMENT IQ' l
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- IACILITY OPERATING. LICENSES._NPF-37.~NPF-66.-NPF-72 AND NPF-77.
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Reference (a), March 17, 1989 S.C. Ilunsader-letter J-
.to T.E. Murley
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-Reference (b),' August ( 25,.1989 S.C. Hunsader letter j'
to'T.E. Murley j
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72 West Adams Street. Chicago. Ilknois L
(Q/~' Chicago lilinois 60:90 0767
- Address R.piy to Post Office Box 767
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r August 25, 1989 r
Dr. Thomas E. Murley, Director i
Office of Nuclear Reactor. Regulation f
U.S., Nuclear Regulatory. Commission Hashington, DC 20555
. Attn:
Document Control Desk i
Subject:
Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 Application for Amendment to Facility Operating Licenses NPF-37, NPF-66 i
Appendix A Technical Specifications NRC Docket Nos. 50-454' 50-455, 50-456 and 50-457
Reference:
(a) March 17, 1989 S.C. Hunsader letter to T.E. Murley
Dear Dr. Murley:
.In. reference (a) pursuant to 10 CFR 50.90, Commonwealth Edison (Edison) proposed'to amend Appendix A, Technical Specifications, of Facility Operating Licenses NPF-37, NPF-66, NPF-72 and NPF-77.
The proposed amendment requested a change to Technical Specification 4.5.2 to modify the existing surveillance requirements for venting of ECCS discharge piping.
This change is expected to reduce exposure to ra~diation in accordance with ALARA guidelines without reducing the safe operation of the ECCS equipment.
The purpose of this letter is to supplement reference (a) with additional information that presents' the amount of radiation exposure expected to.be saved. Attachment A provides a representative example for Byron Unit I and Braidwood Unit 1, with respect to radiation exposure.
This review was performed for Unit 1 at each station because seven (7) high point vent valves ara installed inside containment in Unit 1, in the Safety Injection (SI) lines, that are not installed inside Unit 2.
During the upcoming scheduled meeting at Braidwood Station on September 25 and 26, 1989 Edison will discuss the details of our review in this area that demonstrates the acceptability of this difference in support of the Technical Specification Amendment request.
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O Dr. T.E.'Murley 2
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i Please direct any questions you may have concerning this submittal'to this office.
Very truly yours, A c 7M S.C. Hunsader Nuclear Licensing Administrator
/scl:0028T:20-21 Att.'s (A):
ECCS Piping Vent Valve Radiation Exposure Savings cc:
Resident Inspector-Braidwood Resident Inspector-Byron t..N. Olshan-NRR S.P. Sands-NRR Regional' Office III
'M.C. Parker-State.of Ill.
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ATTACHMENT A
.g BYRON /BRAIDWOOD ECCS PIPING VENT VALVES i
UNIT 1 RADIATION EXPOSURE SAVINGS ASSUMPTIONS:
-UNIT AT FULL POWER GENERAL AREA DOSE RATES (utilizing low dose hold areas) 0.25 HOUR STAY TIME PER LOCATION 3 PERSONNEL PER LOCATION PERFORMED MONTHLY (le 12 INSPECTIONS PER YEAR) i 4 LOCATIONS AT 377' R06, R07 7 TO 10 MR/HR X 4 LOCATIONS X 3 PERSONS X 0.25 HOUR
=21-30 MR/ PERFORMANCE 30 MR/ PERFORMANCE X 12 PERFORMANCE
=0.25-0.36 MAN-REH/ YEAR
-0.32 AVERAGE MAN-REH/ YEAR 2 LOCATIONS AT 412' R06 10 TO 20 MR/HR X 2 LOCATIONS X 3 PERSONS X 0.25 HOUR 30 HR/ PERFORMANCE 30 HR/ PERFORMANCE X 12 PERFORMANCE
=0.18-0.36 MAN-REM / YEAR
-0.27 AVERAGE MAN-REM / YEAR 2 LOCATIONS AT 412' R02 50 TO 150 MR/HR X 2 LOCATIONS X 3 PERSONS X 0.25' HOUR 225 MR/ PERFORMANCE 225 MR/ PERFORMANCE X 12 PERFORMANCE
=0.9-2.7 MAN-REM / YEAR
-1.8 AV,ERAGE MAN-REH/ YEAR TOTAL AVERAGE YEARLY MAN-REM SAVINGS:
0.32 + 0.27 + 1.8 - 2.39 MAN-REM
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