ML19339C072
| ML19339C072 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 10/27/1980 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19339C071 | List: |
| References | |
| NUDOCS 8011170460 | |
| Download: ML19339C072 (1) | |
Text
eThe availability of the systems is demon-into the primary cuolant system fullowing a loss-of-coolant accident and are based
[strated by immediately demonstrating the operability of the components redundant to on the values used for the accident analysis.
we the failed one, as well as the operability (4) o of the inter-related systems and the JOstandby AC and DC power supplies that feed The limits for the accumulators, and their
%%them.
The continued availability of these pressure and volume assure that 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 initiating hot shutdown.
Thus, the require-and three heat exchangers ere located in the ment for core cooling in case of a postu-Auxiliary Building and are a shared system lated 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 reduce 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 e 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 p
' rides sufficient redundancy.
(5)
+
repairs.
A tu
.1 of six service water pumps are 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 loss-of-coolant accident.
(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 shutdoun condition.
purge combustible gases from the containment following a loss-of-conlant accident (7)(8).
The limits for the boron injection tank The containmment 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.
The instrumentation, equipment and required boron concentration for injection procedures for the tests which are required on the ventilation filter system will generally conform to the recommendations of ANSI N510-1975 194 Amendment No. 57 Unit 1 Amendment No. 54 Unit 2