ML20203D744
| ML20203D744 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 07/16/1986 |
| From: | Whittier G Maine Yankee |
| To: | Thadani A Office of Nuclear Reactor Regulation |
| References | |
| GDW-86-173, MN-86-95, NUDOCS 8607210277 | |
| Download: ML20203D744 (2) | |
Text
.
MAME HARHEE 'ATOMICPOWERCOMPADHe
,uaugr,K,?n"e%s h
(207) 623-3521 O
July 16, 1986 HN-86-95 GDH-86-173 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D. C.
20555 Attention:
Mr. Ashok C. Thadani, Director PHR Project Directorate #8 Division of Licensing
References:
(a) License No. GPR-36 (Docket No. 50-309)
(b) HYAPCo Letter to US NRC dated July 1, 1986.
(HN-86-84) SPDS Isolation Device
Subject:
SFDS Isolation Device Gentlemen:
In response to a verbal request from your staff, please find attached a schematic depicting the major components and relative location of the isolation devices within the SPDS cabinet installed at Maine Yankee.
As we stated in Reference (b), we plan to change the power supply to the two SPDS cabinets to a ten amp power supply, as depicted in the enclosed schematic.
This change will be made as soon as practicable following receipt of your acceptance.
He hope this information is sufficient for the staff to complete its evaluation of the SPDS design.
Please do not hesitate to contact me if you should have any additional questions in this matter.
Very truly yours, HAINE YANKEE AT0 HIC P0HiR COMPANY 0
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G. D. Whittier, Manager Nuclear Engineering and Licensing GDH/bjp Attachment
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cc: Dr. Thomas E. Hurley Y
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Hr. Pat Sears Mr. Cornelius F. Holden i
7815L-SDE
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ISOLATION CAkD - Note 2 d
--.--.-..------------3 e
8 6
8 e
Isolated output to plant Ccuputes ]
g
,8
[T a Class IE Input 8
$/-
e trem Field
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/
g
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+35V C
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Power 8
were 4 e
3 a
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Supply l
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5 l
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2 q
Note 3 e
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a 8
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- 7 N -r/s 2
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10 Amp N
breaker
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4
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10A 2-pole kreaker Side iSide k
15V y'
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120 VAC
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l Ok t A l-N P/S c
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Note 3 8
I L._-- -. - - ---- --- - - -- -
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IT Notes v
- 1. +5V is provided for alarming and g
From Backup switching functions only g
Power Supplies
- 2. Four independent isolation devices on each card with conson *15V outputs
- 3. +15V and -15V Power Supplies
~ontale over voltage protec tion modult rated at 8 Amps 4: Isolation Device 10 Asp Breaker Ckt B h To Backup backup 5 and ISV i
Power Supplies Power Supplies identical to Above Maine Yankee SPDS Isolation Devices Schematic
_A t tachment A