ML20215M693
| ML20215M693 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 10/23/1986 |
| From: | Martin T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Opeka J CONNECTICUT YANKEE ATOMIC POWER CO. |
| References | |
| NUDOCS 8611030167 | |
| Download: ML20215M693 (2) | |
See also: IR 05000213/1985008
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DDT 2 31986
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Docket No. 50-213
Connecticut Yankee Atdmic Power Company
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ATTN: Mr. J. F. Opeka
Senior Vice President - Nuclear
Engineering and Operations Group
P. O. Box 270
Hartford, Connecticut 06101
Gentlemen:
Subject: Inspection No. 50-213/85-08
We have received your letter, dated October 3, 1986, outlining your long-term
corrective actions planned to resolve signal cable transmission problems bet-
ween the Meteorological Building and the Control Room at the Haddam Neck Plant.
These actions will be examined during a future inspection of your Radiological
Environmental Monitoring program.
Your cooperation with us is appreciated.
Sincerely,
Oririn.6i 5iero II7
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as T. 'Ma t n, Dirdcior
Division of Radiation Safety
and Safeguard 2
cc:
R. Graves, Plant Superintendent
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D. O. Nordquist, Manager of Quality Assurance
R. T. Laudenat, Manager, Generation Facilities Licensing
E. J. Mroczka, Vice President, Nuclear Operations
' Gerald Garfield, Esquire
Public Document Room (PDR)
Local Public Document Room (LPDR)
Nuclear Safety Information Center (NSIC)
NRC Resident Inspector
State of Connecticut
D611030167 861023
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Management Assistant, DRMA (w/o enc 1)
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T. Rebelowski, SRI, Millstone 3
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CONNECTICUT YANKEE ATOMIC POWER COMPANY
B E R L I N.
P O BOX 270
HARTFORD. CONNECTICUT 06141-0270
TELEPHONE
203-665-5000
October 3,
1986
Docket No. 50-213
B11652
Mr. Thomas T. Martin, Director
Division of Radiation Safety and Safeguards
U.S. Nuclear Regulatory Commission
Region I
631 Park Avenue
King of Prussia, Pennsylvania
19406
References:
(1)
T.
T. Martin letter to J.
F. Opeka, dated
May 20, 1985
(2)
J.
F. Opeka letter to T.
T. Martin, dated
August 14, 1985
Gentlemen:
Haddam Neck Plant
Inspection Report No. 50-213/85-08
Informational Letter in Regard to
Unresolved Item No. 50-213/85-08-04
I&E Inspection No. 50-213/85-08 identified an unrer31ved item
(No. 50-213/85-08-04) in regard to Connecticut Yankee Atomic
Power Company's (CYAPCO) inability to bring meteorological
monitoring equipment within tolerance ranges specified in cali-
bration procedures.
As pointed out in the inspection report,
CYAPCO attributes this problem to defects in certain pairs of the
underground meteorological signal cable between the Meteoro-
logical Building and Control Room.
Because of this problem,
CYAPCO committed to provide a short term solution and evaluate
potential long term solutions considering the recurring nature
associated with the underground meteorological signal cable.
Again, as noted within your inspection report on March 31, 1985,
during a phone conversation CYAPCO confirmed that a short term
solution had been accomplished.
This was done by utilizing spare
pairs within the existing cable for meteorological signal trans-
mission.
Once this switchover was completed, successful
instrument calibration was attained.
This short term solution
did not address the concern about the long term ir2tegrity of the
underground cable.
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In response to your second request to evaluate a long term
solution, phase one of the two part action plan committed to in
Reference (2) has been completed.
A supplemental means of data
transmission via use of an on-demand, dial-up data terminal was
installed in the control room to obtain meteorological data from
the mini-computer at the base of the tower, via a telephone line
completely separate from the underground meteorological signal
cable.
This terminal was operational on October 1, 1985.
The
strip chart recorders remained operative.
Thus, there are
presently duplicate paths for getting meteorological data to the
control room.
The planned final solution to provide meteorological data access
in the control room, which we initially planned to have in-
service by October 11, 1986 per Reference (2), entails replacing
the existing analog recorders with digital data displays and
installing a dedicated, real time data terminal.
This will
continually display meteorological data which will be digitally
transmitted via a telephone line rather than by the existing
underground cable whose long-term integrity is uncertain.
The request from the station for corporate engineering assistance
was delayed due to relatively low priority (the interim fix
worked well) during preparations for, and conduction of a major
refueling outage.
Evaluation of manpower resources by corporate
engineering, when the request was finally received, determined
that an inservice date of December 1,
1987 would be reasonably
achievable, given other work in progress or already planned.
This is the date by which CYAPCO intends to implement the above
described final solution.
Very truly yours,
CONNECTICUT YANKEE ATOMIC POWER COMPANY
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J% f. Op6Ma
Senior Vice President
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