ML18043A434

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Responds to NRC 781026 Request for Addl Info Re Automatic ECCS Realignment & Isolation of Reactor Protection Sys from non-safety Sys.Due to Problems W/Interpretation of Term Isolation Recommends Meeting Be Scheduled to Resolve Item
ML18043A434
Person / Time
Site: Palisades Entergy icon.png
Issue date: 01/25/1979
From: Hoffman D
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To: Ziemann D
Office of Nuclear Reactor Regulation
References
TASK-06-07.B, TASK-07-01.A, TASK-6-7.B, TASK-RR NUDOCS 7901290253
Download: ML18043A434 (2)


Text

consumers

  • Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201
  • Area Code 517 788-0550 January 25, 1979 Director, Nuclear Reactor Regulation Att Mr Dennis L Ziemann, Chief Operating Reactors Branch No 2 US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - SEP TOPICS VI-7.B, REGULATORY DOCl\ET FILE COPY VII-1.A and VII-2 Consumers Power Company's response to the NRC re~uest for additional infor-mation dated October 26, 1978, is as follows:

Item 1

  • Topic VI-7.B, ESF Switchover From Injection to Recirculation Mode (Automatic ECCS Realignment)

Schematics for the automatic controllers used (if any) to perform the change-over.

Response

The schematics for the automatic controllers used to perform the change-over from Injection to Recirculation Mode are found in the Palisades FSAR Section 6.1.2.1, Figure 6-2, Section 8.5.5 and Figures 8-16, 8-18 and 8-19.

Schematics E-207, Rev 7 and E-246, Rev 3 (Sheet 1 of 2) and Rev 5 (Sheet 2 of 2) are updated copies of Figures 8-16 and 8-19, respectively.

Item 2 Topic VII-1.A, Isolation of Reactor Protection System From Non-Safety Systems, Including Qualification of Isolation Devices Drawings and schematics which show:

A. How the Reactor Protection System gets its input signals.

B. How the other system inputs are isolated from the Reactor Protection System inputs .

7901:29 °d--53

' 2

  • Response Due to problems with interpretation of the term "isolation" and to the amount of information required to respond completely to this request, we recommend that a meeting be scheduled to resolve the issue.

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

A. Normal operation, including normal shutdown.

B. LOCA.

C. Other emergency situations.

Details of automatic load sequencing system or equipment (if any).

Response

The information requested concerning diesel generator loads and load sequencing is contained in Palisades FSAR Section 8.4.1, 8.5 and Figures 8.6 and 8.8-8.11. Drawings E-139, Rev 10 (Sheet 1 of 2) and Rev 9 (Sheet 2 of 2), E-206, Rev 7 (Sheet 1 of 2) and Rev 5 (Sheet 2 of 2) and E-209, Rev 14 (Sheets 1 and 4 of 4) and Rev 12 (Sheets 2 and 3 of 4) are the most recent revisions of Figures 8.6, 8.10 and 8.11, respectively.

David P Hoffman (Signed)

David P Hoffman Assistant Nuclear Licensing Administrator CC JGKeppler, USrlRC