ML20150B961

Requests Addl Info on ESF Switchover from Injection to Recirculation Mode,Isolation of Reactor Protec Sys from non- Safety Sys,Esf Sys Logic & Design,& Specific Drawings of Elec Sys & Complete Plant Elec Drawing Indices

ML20150B961
Person / Time
Site:	Yankee Rowe
Issue date:	10/26/1978
From:	Ziemann D Office of Nuclear Reactor Regulation
To:	Groce R YANKEE ATOMIC ELECTRIC CO.
References
TASK-06-07.B, TASK-07-01.A, TASK-07-02, TASK-RR NUDOCS 7811100027
Download: ML20150B961 (3)

Text

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j,,f{.fi[kj NUCLEAR REGULATORY COMMissl0N WA$m N GTON, 0. C. 20555

%, I [ October 26, 1978 Decket No. 50-29 Yankee Atomic Electric Company g ATTH: Mr. Rot,ert H. Groce -

x' Licensing Engineer 20 Turnpike Road

• Westboro, Massachusetts 01581 Gentlemen:

We have received drawings in response to our June 26, 1978 letter, which will be used in our review of several SEP topics. The schematic diagrams for control of all automatic and manual electrical load transfers between redundant safety buses, complete plant electrical drawing indices, drawings snowing battery and charger alarms and indication, and schematic diagrams for -

AC and DC MOVs were not included in the drawing set submitted for the Yankee tiowe Atomic Power Station. We request that you submit copies of these drawings in accordance with tne instructions in our June 26, 1978 letter.

Based on our initial review reiated to SEP Topics VI-7.8., VII-1. A. and VII-2., we request that you provide the information requested in the encicqure or detailed references to previously docketed information that is still current.

We would appreciate receiving this informatior as soon as possible.

Sincerely,

( .

is ,

Dennis L. Ziemann, Chief Operating Reactors Branch 72 Division of Operating Reactors

Enclosure:

Request for Additional information cc w/ enclosure:

See next page Z

7811100 0 7'

Yankee Atomic Electric Company October 26, 1978 cc w/ enclosure:

Mr. Lawrence E. Minnick, President Yankee Atomic Electric Company 20 Turnpike Road Westboro, Massachusetts 01581 Greefield Community College 1 College Drive Greanfield, Massachusetts 01301 K M C Inc.

ATTN: Mr. Jack McEwen 1747 Pennsylvania Avenue, N. W.

Suite 1050 Washington, D. C. 20006

EtlCLOSURE REQUEST FOR ADDITIO!!AL INFORMATION Please submit the following information:

1. Topic VI-7.B ESF Switchover From Injection to Recirculation Mode TAutomatic EEFPlaIfignnent)

Schematics for the automatic controllers used (if any) to perform the changeover. ,

2. Topic VII-1.A Isolation of Reactor Protection System From tion-Safety Systens, including Qualification of Isolation Devices Drawings and schematics which show:

A. How the Reactor Pr otection System gets its input signals.

B. How the other systen inputs are isolated froa the Reactor Protection Systen inputs.

3. Topic VII-2 Engineered Safety Features (ESF) Systen Logic and Desirn A list of the diesel generator loads which are to be supplied under various conditions, including:

A. flornal operation, including normal shutdown B. LOCA C. Other energency situations Details of automatic load sequencing systen or equipment (if any).

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