ML20137P415
| ML20137P415 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 12/02/1985 |
| From: | PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | |
| Shared Package | |
| ML20137P407 | List: |
| References | |
| NUDOCS 8512050003 | |
| Download: ML20137P415 (3) | |
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PBAPS LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REOUIREMENTS 3.7.A l Primary Containment (Cont'd.)
4.7.A Primary Containment (Cont'd.)
3.
Pressure Suppression Chamber -
3.
Pressure Suppression Chamber -
Reactor Building Vacuum Breakers Reactor Building Vacuum Breakers
- a. Except as specified in 3.7. A.3.b
- a. The pressure suppression chamber-j below, two pressure suppression reactor building vacuum breakers chamber-reactor building vacuum and associated instrumentation breakers shall be operable at including setpoint shall be i
all times when primary contain-checked for proper operation ment integrity is required.
every refueling outage.
The setpoint of the dif ferential pressure instrumentation which actuates the pressure suppression chamber-reactor building vacuum breakers shall be 0. 5.+/- 0. 25 psid.
- b. From and after the date that one of the pressure suppression chamber-reactor building vacuum breakers is made or found to be inoperable 2
for any reason, reactor operation 4
is permissible only during the succeeding seven days unless such vacuum breaker is sooner made oper-able provided that the repair proce-dure does not violate primary 4
containment integrity.
4.
Drywell-Pressure Suppression 4.
Drywell-Pressure Suppression Chamber Vacuum Breakers Chamber Vacuum Breakers
- a. When primary containment is
- a. Each drywell-suppression chamber required, all drywell-suppression vacuum breaker shall be chamber vacuum breakers shall exercised through an' opening-be operable and positioned closing cycle once a month.
in the fully closed position (except during testing) except
- b. When it is determined that as specified in 3.7. A.4.b and a vacuum breaker is inoperable l
c-below, for opening at a time when operability is required,
- b. Drywell-suppression chamber all other vacuum breakers l
vacuum breaker (s) may be shall be exercised immediately "not fully seated" as and every 15 days thereafter shown by position indication until the inoperable if testing confirms that the vacuum breaker has been l
bypass area is less than or returned to normal service.
equivalent to a one-inch diameter hole.
Testing shall be initiated within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />
- c. Once per operating cycle of initial detection of a each vacuum breaker shall "not fully seated" position be visually inspected
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8512050003 851202 DR ADOCK 05000277 p
PBAPS LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS
)
. 3.7.A Primary Containment (Cont'd) 4.7.A Primary Containment (Cont'd.)
indication and shall be per-to insurc proper maintenance formed periodically there-and operation.
after as follows:
(1)
Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> following d.
A leak test of the drywell to vacuum breaker exercising suppression chamber structure required by 4.7.A.4.a and shall be conducted at each 4.7.A.4.b.
refueling outage to assure l
no bypass larger than or (2)
Once per month provided equivalent to a one-inch indication shows that it diameter hole exists between is less than 3 degrees the drywell and suppression open, and provided that the chamber.
torus-to-drywell dif ferential pressure has not been sufficient to cause vacuum breaker opening.
Initiate a test within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of detection of a suppres-sion-to-drywell dif ferential pressure sufficient to cause vacuum breaker opening (only if not " fully seated" valve (s) are indicated).
(3)
Once per 15 days if the require-ments of 3.7. A.4.b( 2) are not
- met, c.
Two drywell-suppression chamber l
vacuum breakars may be inoperable for opening.
d.
If speci fications 3.7. A.4.a, b, or c cannct be met, the situa-tion shall be corrected within l
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or the unit shall be placed in a cold shutdown condition in an orderly manner.
-171-
PBAPS a..
- s
- ~'.
SURVEILLANCE REQUIREMENTS LIMITING' CONDITIONS'FOR OPERATION
,3. 7. A. Primary Containmert (Cont'd.)
4.7.A Primary Containment (Cont'd.)
5.
Oxygen Concentration 5.
Oxygen Concentration
.u.
The primary containment atmos-The primary containment oxygen phere 'shall be reduced to less concentration shall be measured than 4% oxygen with nitrogen gas an6 recorded at least twice during reactor power operation weekly.
with reactor coolant pressure above 1
100 psig,. except as specified in
- 3. 7.' A. 5.b.
- 6..Within the 24-hour period,~ subsequent to placing the reactor in the Run mode following a shutdown, the containment atmosphere oxygen concentration shall be reduced to less than 4% by volume and maintained in this condition.
Da-inerting may commence 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to a shutdown.
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-171a-1.
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