B11319, Forwards Responses to SER Confirmatory Items 39 & 41 Re non-Class 1E Control Signals & Testing Capability, Respectively.Fsar Section Referenced in Response to Confirmatory Item 41 Provided in Amend 8 to FSAR
| ML20098E808 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 09/21/1984 |
| From: | Counsil W NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| B11319, NUDOCS 8410010398 | |
| Download: ML20098E808 (4) | |
Text
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(203) 665-5000 September 21,1984 Docket No. 50-423 B11319 Director of Nuclear Reactor Regulation Mr. B. 3. Youngblood, Chief Licensing Branch No.1 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Reference:
(1)
B. 3. Youngblood to W. G. Counsil, SER for Millstone Nuclear Power Station, Unit No. 3, dated August 2,1984.
(2)
W.
G.
Counsil to B.
3.
Youngblood, Transmittal of Amendment 8, dated June 4,1984.
Dear Mr. Youngblood:
Millstone Nuclear Power Station, Unit No. 3 Transmittal of Responses to the SER Confirmatory Items Enclosed are Northeast Nuclear Energy Company's responses to the SER Confirmatory Items 39 and 41. The FSAR section referenced in the response to the confirmatory item 41 was provided in Amendment 8 to the FSAR (Reference 2). These responses should fully resolve the Staff's concern regarding the Confirmatory Items 39 and 41.
If there are any questions, please contact our licensing representative directly.
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY et. al.
BY NORTHEAST NUCLEAR ENERGY COMPANY Their Agent J1 W. G. Counsil Senior Vice President
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STATE OF CONNECTICUT )
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1 Then personally appeared before me W. G. Counsil, who being duly sworn, did state that he is Senior Vice President of Northeast Nuclear Energy Company, an Applicant herein, that he-is authorized to execute and file the foregoing information in the name and on behalf of the Applicants herein and that the statements contained in said information are true and correct to the best of his knowledge and belief.
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I f'otary Pubgd My Commission Exphes March 31,1988 E--
Millstone Unit No. 3 ~
Confirmatory Items Instrumentation and Control Systems Branch
~ SER-C39 : Non-Class. lE Control Signals to Class IE Control Circuits (SER c7.3.3.11) -
The staff requested the applicant to provide a list 'of non-Class IE control signals
. that are used as inputs to Class IE control circuits and assess their effects on j
the safety systems. By a letter dated May 4,1984, the applicant provided a list of non-Class lE signals to Class IE circuits. The applicant stated that these non-Class IE signal can only act to the safe direction and therefore will not degrade safety systems. This is a confirmatory item subjecti to staff's review of.
1 all the related electrical drawings, which are not available at the present time.
4
Response
A copy (microfiche) for each of the following dra.vings was provided directly to
~
your Mr. Hulbert Li, Instrumentation and Control Systems Branch on June 19,
'1984.
1 Logic Diagrams 3TMB FSK 16-5 issue 6 3CHS FSK 26-21ssue 13 3 MSS FSK 03-01 issue 11 3HVC FSK 22-9 issue 8 -
Elementary Diagrams ESK-5BB ESK-73 ESK-73E ESK-5BC '
ESK-7QE ESK-5BD ESK-7L ESK-7QF ESK-5BE ESK-7CR.
ESK-7QG ESK-5BF ESK-7CS ESK-7QH ESK-5BG ESK-7CT ESK-7TA
. ESK-5EX ESK-7CU ESK-7TC ESK-6AN ESK-7CV ESK-7ABU ESK-6AP ESK-7CW ESK-7AB ESK-6GD ESK-7DX ESK-8 DA ESK-6GE ESK-7FE ESK-3DB ESK-6PK ESK-7FF ESK-83B
- ESK-6PL -
ESK-7FG ESK-83C ESK-6PM ESK-7FH ESK-83D ESK-6PN ESK-73A ESK-83F ESK-6ADG ESK-73B ESK-8HC i-
. ESK-6AMG
' ESK-73C '
ESK-8HG ESK-7H ESK-73D f-W SER C39-1
, ~,.
Millstone Unit No. 3 Confirmatory Items Instrumentation and Control Systems Branch SER-C41 BOP Instrumentation and Control System Testing Capability (SER 7-3.3.14)
FSAR Sections 7.2.2.2.3 and 7.3.2.2.5 describe the capability for testing the reactor trip system and the engineered safety features (ESP) system. Most of the descriptions cre based on NSSS scope of supply equipment. It is not clear whether all the BOP instrumentation and control systems satisfy the same criteria. The staff cited an example of the refueling water storage tank (RWST) level measurement, which is a BOP design. The low-low loop signal fron' one out of two level switches will automatically stop the residual heat removal pump.
The empty tank signal from one out of two level switches will automatically stop the quench spray pumps. The testing of these actuation logic circuits is not discussed in the FSAR, and they are not tested by the same method as NSSS ESF 1
instrument systems. The staff requested that the applicant perform a thorough evaluation of the BOP safety-related instrumentation and control systems with respect to testing capabilities, identify any instrument channels that cannot be tested as described in Sections 7.2.2.2.3 and 7.3.2.2.5, and justify that the design L
is in conformance with the testing requirements of GDC 21. By a letter dated April 2,1984, the applicant provided a draf t response to address each BOP safety-related instrumentation and control system with respect to testing
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capabilities and its conformance with the testing requirements of GDC 21. On 3
the basis of its audit review, the staff finds that there is reasonable assurance that the BOP designs are in conformance with GDC 21. This is a confirmatory
-I item subject to documentation in the FSAR.
3
Response
3 Refer to the revised FSAR Section 7.3.1.1.5 (FSAR Amendment 8, dated May 5
1984),
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2 Closed.
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SER C41-1 5
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