ML20198D077

Proposed Tech Spec 1.4.D, Containment Purge Sys

ML20198D077
Person / Time
Site:	Maine Yankee
Issue date:	05/08/1992
From:	Maine Yankee
To:
Shared Package
ML20198D074	List: ML20198D070 ML20198D077
References
NUDOCS 9205150213
Download: ML20198D077 (2)

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ATTACILMENT B Proposed Technical Specification Change - Page 1.4-2 L:\propchrg\PC166 9205150213 920500 PDR ADOCK 05000309 P PDR

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4. The automatically actuated containment isolation valves are designed to close upon high pressure in the containment structure. No single component failure in the actuation system will prevent the isolation valves from functioning as designed.

C. [pptainment Emeraentv Coolina System (Encineered Saftgaards)

A redundant safeguards system shall be provided to limit the containment internal pressure rise to a value less than the containment design pressure in the event of a loss-of-coolant incident, The system shall consist of two spray pumps, two heat exchangers, two spray rings and associated piping and valves, all designed and constructed in accordance with Section 6 of the FSAR. Sodium hydroxide solution is added to the containment spray for removal of iodine from the containment atmosphere.

D. Cantainment Purae System

> A system shall be provided.to vent the containment atmosphere in-a controlled manner following a loss-of-coolant-incident to

-limit the hydrogen concentration within the containment. The

( system consists of 2" piping and associated valves from the containment dome.to the particulate and charcoal filters located in the primary auxiliary building and then to the

'[ plant stack. The system includes provisions for sampling the hydrogen concentration and a flow meter to measure venting

[ rate. . The entire system is designed to seismic Cluss I criteria. A redundant purge path is provided via the

[. containment ventilation systep; p

[

References:

. FSAR Sections 5 and 6.

l 1.4-2

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