ML19331C941
| ML19331C941 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 08/15/1980 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML19331C940 | List: |
| References | |
| NUDOCS 8008200315 | |
| Download: ML19331C941 (4) | |
Text
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O ATTACHMENT 1 Technical Specification Changes for Zion Station The following pages have been modified:
178, 194 and 195 goo s e 0 0315
LIMII7NG CONDITION FOR OPERATION SURVEILLANCE REQUIREMENT l3 0 7
Jervice wa ter sys tem
- l4.8 7 Service water system (Table i.8-6)*
A.
Three service water pumps lA, 1B, 1C A.
Surveillance and testing of the service (2A, 2B, 2C) per unit shall be operable water sys tem shall be performed as whenever the reactor is going from hot follows:
shutdown to hot standby.
- 1. The service water pumps shall 'oe operated each month.
Performance will be accepta' ole if the pu r.p starts upon actuation, operates for at least fcur hours, and satisfies the ecoling re-quirements necessary for the routine
}
operation of the service water system.
- 2. The service water pump system power opera ted valves shall be stroked manually from the control room each
- .c n t h.
Performance will ce acce?t-acle if va' ce mction is indice d
up:n actuation.
- eces'er 31, 1961, one service water pump may
- Until Decen.aer 31, 1981, the surveillance require-C;n t '.1 o
re out of service for maintenance purposes.
Du ring ments of 4.8.7.0 do not pertain tc the service
.s p
- cd, the required _ number of opera' ole pumps water pump cut cf service for maintenance purpcsea.
.4 atated in 3.o.7 A.,
3.c.7.B., and 3.8.7.C may te reduced oy cne for a single unit provided the main 4c-inch service water headers for each unit are cross-tied.
While in the cross-tied mode, an Operating service water pump from the other unit with independent stand'oy AC and DC power supply may oe used to fulfill the requirements of 3.8.7 178
The availability of the systems is demon-into the primary coolant system following strated by immediately demonstrating the a loss-of-coolant accident and are based operability of the components redundant to on the values used for the accident analysis.
the failed one, as well as the operability (4) of the inter-related systems and the standby AC and DC power supplies that feed The limits for the accumulators, and their them.
The continued availability of these pressure and volume assure the required components during the repair period is amount of water injection with the required demonstrated by repeating these tests daily.
boric acid concentration following a loss-of-coolant accident, and are based on the Assuming a reactor has been operating at values used for the accident analyses. (4) full rated power for at least 100 days, the magnitude of the decay heat decreases after The five component cooling system pumps init}ating hot shutdown.
Thus, the require-and three heat exchangers are located in the ment for core cooling in case of a postu-Auxiliary Building and are a shared system la ted loss-of-coolant accident while in the between Units I and II.
The components are hot shutdown condition is significantly accessible for repair af ter a loss-of-coolant reduced below the requirements for a pos-accident.
During the recirculation phase tulated loss-of-coolant accident during following a loss-of-coolant accident on a power operation.
Putting a reactor in unit, only one component cooling pump and the hot shutdown condition significantly heat exchanger is required for minimum safe-reduces the potential consequences of a guard of that unit.
Therefore, a minimum loss-of-coolant accident, and also allows requirement of 4 component cooling pumps and more free access to some of the engineered three heat exchangers for two operating units safeguards components in order to effect provides sufficient redundancy. (5) repairs A total of six service water pumps are l
Failure to complete repairs within an installed; only one service water pump is additional 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> of going to the hot required immediately following a postulated shutdown condition is considered indicative l loss-of-coolantaccident. (6) (see
- p. 195) of a requirement for major maintenance and therefore in such a case, the reactor is to The hydrogen purge system is. designed to be put into the cold shutdown condition.
purge combustible gases from the containment following a loss-of-coolant accid ent (7)(8).
The limits for the boron injection tank The containment hydrogen sampling system is and refueling water storage tank insure used to determine the effectiveness of this the required amount of water with the system.
required boron concentration for injection j
e t
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194 i
A hydrogen recombiner system is beino installed to If during this seven (7) day period a third remove the hydrogen aryl oxygen gases that accumulate s.ervice water pump becomes inoperable, the unit in the containment atansphere followiry a loss-of-will be brought to hot shutdown within four (4) coolant accident. (9) The system operability require-hours unless one of the inoperable pumps are ment becomes effective following successful pre-returned to operable status. The requirement operational testing. This equipnent shall be installed for independent standby AC and DC power supplies ty/ the first refueling outage on Unit 1, if delivery for an operating service water purnp fran the schedules oermit.
other unit precludes the gossibility of losing two service water pumps dedicated to the same The equipnent used in evaluating the post loss of unit because of the failure of a camon power cmlant accident condition is required to provide
- supply, ronitoring of the reactor, primary containment (10) and radiation effect to the environs, both on site and off site. The required equiprent has been built and tested to meet the expected conditions where the conditions will be other than normal operating conditions.
(1) PSAR Chapter 9 (2) PSAR Section 6.2 Until Dccember 31, 1981, one service water pump at (3) FSAR Section 6.2.3 a time may be taken out of service to perform (4) FSAR Section 14.3 maintenance on the associated circulating water (5) PSAR Section 9.3 purp.
In order to work on a circulating water l (6) FSAR Section 9.6 and 5'SAR Answer to Question purn, an intake plenum must be drained. The intake I
9.1 ple'n.m is a conmon reservoir for a service water (7) PSAR Section 14.3.6 rxmp and a circulating water pump. This leaves (8) FSAR Answer to Question 9.9
'five service water pimps in service, which will (9) FSAR Section 6.8 provide suf ficient coverage for any postulated loss (10) FSAR Section 7.5.3 of coolant accident coincident with a loss of offsite power and any other single failure of an active component. With this temporary specification, should a secord service water pump become inoperable, it must te returned to operable status within seven (7) days or the unit will be brought to hot shutdown.
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