ML20235J125

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Forwards Test Rept Demonstration of 1E to Non-1E Isolation for RS-232C Serial Data Port, Per Sser 12.Appended to Encl Test Rept Are Rev 2 to Previously Submitted Test Procedure & Supporting Documentation
ML20235J125
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 02/17/1989
From: Beck J, William Cahill
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20235J128 List:
References
TXX-89079, NUDOCS 8902240182
Download: ML20235J125 (1)


Text

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t.og' #.TXX-89079 File # 919' 1UELECTRIC i

l February.17, 1989

w. s. c.nm ).

Executive Yke Presdent '

U. , S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555'

SUBJECT:

COMANCHE PEAK' STEAM ELECTRIC STATION (CPSES)

DOCKET N0. 50-445 AND 50-446

' SUBMITTAL OF CORE COOLING MONITOR (CCM)

ISOLATOR TEST REPORT ,,

Reference:

(1) CPSES Supplemental Safety Evaluation Report No'.12 dated October 1985 (2),TV Electric letter to NRC, TXX-88638 dated 8/29/88 Gentlemen:

'As . requested in reference (1), TU Electric is submitting the enclosed test report, by Whittaker Electronic Resources Division.- This re) ort demonstretos that the SPDS isolation devices will prevent a maximum credi)1e fault on the output of the device from degrading the safety-related portion of the circuit.

Reference (2) provided the NRC a copy of the CCM Isolator Test Procedure and the proposed test schedule. Appended to the enclosed test report are Revision 2 to the prev.iously submitted test

'(e.g. drawings, calculations, etc.) procedure, and supporting documentation .

Sincerely, William J. Cahill, Jr.

By:_ A d.

JohfW. Beck Vice President, Nuclear Engineering VPC:mbk Enclosure c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3)

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8902240102 890217 .,

PDR ADOCN 05000445

  • ax) North Ohve Street LB81 Dallas, Texas 75201

'g .. PDC 9

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