IR 05000336/1987016
| ML20236R360 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 11/16/1987 |
| From: | Johnston W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Mroczka E NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| NUDOCS 8711230239 | |
| Download: ML20236R360 (2) | |
Text
_-
,
o NOV 161987 Docket No.
50-336 Northeast Nuclear Energy Company ATTN: Mr. E. J. Mroczka Senior Vice President - Nuclear Engineering and Operations Group P. O. Box 270 Hartford, Connecticut 06141-0270 Gentlemen:
Subject:
Inspection No. 50-336/87-16 This refers to your letter dated October 23, 1987, in response to our. letter dated September 25, 1987.
Thank you for informing us of the corrective and preventive actions documented in your letter. These actions will be examined during a future inspection-of your licensed program.
Your cooperation with us'is appreciated.
Sincerely,
,
Original Si::nC4 DYI cliff crd J. AMcMW William V. Johnston, Acting Director Division of-Reactor Safety
../!//
cc:
W. D. Romberg, Vice PresideWt, Nuclear Operations S. E. Scace, Station Superintendent D. O. Nordquist, Manager of Quality Assurance R. M. Kacich, Manager,- Generation Facilities Licensing
' Gerald Garfield, Esquire Public Cocument Room (PDR)
.
Local Public Document Room (LPDR)
Nuclear Safety Information Center (NSIC)
NRC Resident Inspector State of Connecticut
g
\\U gepg wqy, G:
0FFICIAL RECORD COPY RL MILL 2 87-16 - 0001.0.0 10/30/87 j
!
-. _ _ _ _ - - _ _ _ _ - _ _ - - _ _ _
____ _ - _
- - _. - _ _ - - - - - - - - _ _
_ _ _ - -
_ _ - _ _ - -
_ _j
/
e Northeast Nuclear Energy Company
o bcc:
Region I Docket Room (with concurrences)
DRP Section Chief P. Swetland, SRI, Haddam Neck J. Shedlosky, SRI, Millstone 3 D. Jaffe, LPM, NRR R. Bores, DRSS i
i l
)
l
i RI:DRS RI.
l Krasopoulos/lp A
l 11/j/87gi 11//#/87 0FFICIAL RECORD COPY RL MILL 2 87-16 - 0002.0.0 10/30/87 l
l L_______...
2036655896
' ' -
_
-_s___
Gewat enices e sewn air t e.* conn, a,.s
,
-
.. _. _. _. _
.C~Z,,'.C in a.
connecticut mar 70
-.
,-
mum October 23,1987
'
.
Docket No Jo 3M B12721 M
ti!!iam T. Russell
'
Regional Administrator Region 1 IJ. S. Nuclear Re6ulatory Commission 631 Park Avenue King c! Prussia,PA 1%06
}
Reference:
(1) William V. Johnston letter to E. 3. Mroczka, dated Sept 25,1917 transmitting Inspection Report No.30 3%/8716.
centlemen, I
Millstone Nuclear Power Station, Unit No. 2 Insxction No.30 3%/8716 The NRC Sta!! transmitted to Northeast Nuclear Energy Company (N subject inspection report in Reference (1). As discussed in Refere Staff cited NNECO for one violation to 10CFR30, Appendix R, S which requires fire protection features to be provided for systems and components important to safe shutdown, such that one train of system necessary to achieve and maintain het shutdown remains free of fire In accordance with the Reference (1) request and pursuant to 10CF NNECO hereby provides'the attached information in response to the No Violation of Reference (1) and a schedule to implement the open ite Reference (1).
j
-
!
it trust you find the attached information satisfactory.
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY h.
Mt.
t'
1.
., n,1 E. 3. Mrocska '
,'
Senior Vice President f
-<-
y;,y;w D. H. Sa!!e. NR C Project Managet, Millstone Unit No. 2 ~
cci w. 3. Raymond, Senior Resident Inspector. Millstone Unit Nos.1,2 and 3 NRC Document Control Desk
-
_ _ _. _ _ _ _. _ _ _ _ - -
~
2036655896
_
l Docket No. 304%
B17al M7
.
,
.
Milhtone Nuclear Pcwer Station Unit No. 2 Inspection No. E *m, 16 l
i l
i October,1987
- _ _ - - _ _ _ _ _
_
_ - - - _ -
,
2036655896 Attachment 1 B12721/Page1 1.
Violation B 1.
Description of Violation
,
10CFR50, Appendix R, Section Ill.G.1 requires that fire p features shall be provided for systems and components im satt shutdown, such Sat one train of systems necessary to ach and maintain het shutdown remains free of fire damage. One method of achieving this is to provide separation of redundant safe shutdown equlprnent by a horizontal distance of more than 2o feet with no intervening combustibles in accordance with loCFR3o, Appendix R, Section Ill.G.2.b. An exemption from the above requirements requested and granted by the commission in accordance with the 10CFR30.12 requirements.
Contrary to the above, the distance separating the redundant auxiliary feedwater headers and their isolation valves 2-FW.OA and 2.F043B was less than the required 20 feet and there were intervening combustibles ln addition no exemption from the ab requirements was requested.
2.
_A# mission or Denialof Violation NNEC0 does not contest the violation as set forth in the Notice of Violation.
3.
Reason for Violation NNECO was fully aware of the requirements and believed it was in fc!! compliance without an exemption request. An analysis had been performed which concluded, that the valves are designed to fail open and that multiple het shorts would be required for the valves to fall closed, that both valves faling closed was not a credible event and inerefore the redundant components could be considered free of fire damage. Based on this analysis an exemption request was not filed, it was considered that the evaluation provided a su!ficient basis for not submitting an exemption request.
Corrective Action Taken Following the identification of the absence of an exemption re from Section !!!.C.2.b of 10CFR$0, Appendix R for the discharge valves 2.FT-43A and 2.Fw-43B of the austhary feedwater system, NNECO established an hourly fire watch patrol of the fire area.
NNECO will maintain the hourly fire watch patrol until such time as the Staff has received and approved the exemption request.
The estimated date for exemption request SJbmittal is February 1, 198a.
T
_ _ _ _ - _ _ - - - - - - - - - - -
~'
--
_
2036655896
.
..
Attachment 1 B12721/Page 2
.
3.
Corrective Actions to Avoid Future Violations NNECO believes that the lack of an exemption request in this instance is an isolated occurrence. NNECO believes that ch the current process to determine the need for an exemption req are not warrahted.
11.. Response to open Items The following information addresses the open items cited on D No.Ed% for Millstone Unit No. 2 during the inspection conducted on July 1317,1987.
!2T ^
In several plant locations th* 1..e detecu systems do not conform with the guidance of the Natic o Pt hotection Association (NFPA) $tandard No.72E.
Responte NNECO plans to add additional and/or relocate detectors in accordance with NFPA 72E in these locations:
'
taste Tank Pump Room Zone A.1C Intake Structure Zone 11
'
HP51 Room
- Zone A4 Stora6e Crlb Area Zone A4 Motor Driven Auxillary Feedwater Pump Room Zone T 3
,
The addition and/or relocation of fire detectors will be completed by March /J,1985, item B
-
Several fire doors in the Auxiliary and Turbine Bu!! din 6s have been modified with fusible link " hold open" devices such t%t they do not conform with the NFPA Standard No.M.
Response NNECO wil1 replace the fusible link " hold-open" devices on the fire coors in accordance with NFPA lo guidelines.
The replacement of fusible link devices with approved NFPA to devices will be completed by January 30,1988.
Item C The sprinkler system in Fire Zone A.19A is obstructed by a newly installed celilng partition.
_ _ _ _ _ _ _ _ _ _
M 2036655896
--
__
l Attachment 1 B12721/Page 3
.
Response NNECO will add an additional sprinkler belo.
the obstruction in Zone A.19A.
The addition of a prinkler will be completed by March M,1988, i
i i
l
!
- 1
J
!
.--
--
- -