ML18030A314

Interim Deficiency Rept Re Changes to Control Room Habitability Sys Two Envelope Concept.Single Envelope Design Meets Applicable NRC Regulations.Changes to Appropriate FSAR Sections Are Being Prepared

ML18030A314
Person / Time
Site:	Susquehanna
Issue date:	06/15/1981
From:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
To:	Schwencer A Office of Nuclear Reactor Regulation
References
10CFR-050.55E, 10CFR-50.55E, PLA-839, NUDOCS 8106230358
Download: ML18030A314 (3)

Text

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A TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONEr (2'I 5) 770-5151 NORMAN Vl. CURTIS Vice President-Engineering rt Construction-Nuclear 770 5381

)JUN 15 l%3 Mr. A. Schwencer, Chief Licensing Branch No. 2 division of Project Management U.S. Nuclear Regulatory Commission Washington, D.C. 20555 SUSQUEHANNA STEAM ELECTRIC STATION

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CONTROL ROOM HABITABILITYSYSTEM ER 100450 PILE 841-2 PLA-839 Reference PLA-830, Curtis to Grier dated 6/5/81 (attached)

Dear Mr. S'chwencert The above referenced document provided an interim report regarding potential reportability, under 10CFR50.55e,. of changes to the Control Room habitability system two envelope concept. These changes involve elimination of the dual pressure differential envelope concept to ensure habitability inside the Control Room and Control Structure. In the revised design, cross flow between the Control Room and the Control Structure has no significance since both are included in the same envelope.

Current evaluations of the Control Structure habitability system including recalculations of Control Room, Technical Support Center (TSC) and Operations Support Center (OSC) radiation doses, indicate that this single envelope design meets applicable NRC regulations. Consequently, changes to FSAR sections on Control Room habitability systems are being prepared for submittal to the NRC.

Very truly yours,

'UK4 CA~ gooi N. W. Curtis Vice President-Engineering & Construction-Nuclear TEG/mks /(

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