ML20078P069

Containment Purge Sys Interim Operation Plan

ML20078P069
Person / Time
Site:	Byron
Issue date:	10/27/1983
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20078P057	List: ML20078P054 ML20078P060 ML20078P064 ML20078P069
References
7510N, PROC-831027-02, NUDOCS 8311030186
Download: ML20078P069 (2)

Text

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4 ATTACHMENT C CONTAINMENT PURGE SYSTEM INTERIM OPERATION PLAN 71 l

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l October 27, 1983 l- ,

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jIIIb Primary Containment Purge System The Primary Containment Purge System'is subdivided into three

- non-safety-related subsystems, (1) miniflow purge, (2) normal purge and-(3) post-LOCA purge. These~subsysters serve the containment (1) during normal plant operating conditio.'s. (2)-during planned

- reactor' shutdowns, and (3) during post-LOCA operating conditions, p , respectively.. -A_ separate purge system is provided for each unit.

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A complete system description is provided-in Section19.4.9 of the Byron /Braidwood FSAR. ,Preoperational test requirements are provided in-FSAR' Table 14.2-39. These requirements call'for the

. Purge System to be operational and tested prior to Unit 1 Fuel' Load.

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During Fuel Loa'd and during low power startup' testing the. fission L product inventory in the. reactor core 11s trivial by comparison with the inventories. employed by the FSAR safety. analyses. There will-be no significant release of- radioactivity resulting from either

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normal operation,1 from . a loss-of-coolant- accident or from a core unloading event. . As a result, there is no need-for the Purge

' System-to be operational during this perico. Only containment

- isolation needs to be verified prior to core loadEto contain the small amounts ~ of radioactivity which may be released , Consequently the startup and. testing plan for the Unit 1 Primary Containment Purge: System has been changed.to the following:'

! l. Prior to Unit 1 Fuel Load: All Unit 1 containment purge c isolation valves will be leak tested.

. 2. Prior-to Unit 1-Operation above 5% power:

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The"42" containment purge valves will not be opened during oepration. If any of the other purge isolation valves need to'be" opened:

1)-'the automatic actuation circuitry testing will be

_ complete.

2) .the structural integrity of the purge duct will be

-verified to assure that there are no unmonitored leak

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! .b. 'The entire purge system will be operational, balanced, and preoperationally tested prior to operation above approximately 5% power.

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, This-startup plan will allow low power testing to be performed s< without causing.any unacceptable levels of risk to the public health and safety.

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