ML20077E059
| ML20077E059 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 05/31/1991 |
| From: | Feigenbaum T PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| RTR-NUREG-0737, RTR-NUREG-0896, RTR-NUREG-737, RTR-NUREG-896, TASK-1.D.1, TASK-TM NYN-91087, NUDOCS 9106060054 | |
| Download: ML20077E059 (4) | |
Text
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New Hampshire Ted C. Feigenbaum Y
k heddent and Chiel [mecutive Of f ker NYN 91087 May 31,1991 United States Nuclear Regulatory Commission Washington, D.C.
20555 Attention:
Document Control Der.k
References:
(a)
Facility Operating License No. NPF-86, Docket No. 50-443 (b)
NUREG 0896, Supplement No. 4, " Safety Evaluation Report Related to the Operation of Scabrook Station, Units 1 and 2* dated May 1986 (c)
NUREG-0896, Supplement No. 9, " Safety Evaluation Report Related to the Opesation of Scabrook Station, Units 1 and 2* dated March 1991
Subject:
Completion of Control Room Design Review, NUREG 0737, item 1.D.1 Gentlemen:
The NRC concluded in NUREG-0896, Section 18.1, [ References (b) and (c)], that the detailed control room design revic.< (DCRDR) for Seabrook Station Unit I satisfactorily met the requirements of Supplement 1 to NUREG 0737, " Clarification of TMI Action Plan Requirements *.
The NRC Staff required that a final evaluation of the control room environment (temperature, humidity, airflow, acoustic noise, auditory signals) be completed and reported to the NRC vithin one year after the commencement of commercial operation.
Pursuant to this requirement, the final evaluation of the control room environment is provided in the Enclosure.
Should you icquire further information on this matter, please contact Mr. Terry L.
liarpster, Diiector of Licensing Services, at (603) 474-9521, extension 2765.
i Very truly yours,
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Ted C. Feiger iaum Enclosure TCF:WJT/ssi 9106060054 910M1 PDR ADOCK 0500
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New Hampshire Yonkee Division of Public Service Company of New Hampshire i
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313 P.O. Box 300
- Seabrook. NH 03874
- Telephone (603) 474 9521
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United States Nuclear llegulatoif Commission May 31,1991 Attention:
Document Control Dest Page two ec:
Mr. Thomas T. Martin llegional Administrator United States Nelear llegulatory Commission Region 1 475 Allendale lload King of Prussia, PA 19406 Mr. Gordon E. !?dison, Sr. Project Manager Project Directorate 13 Division of Reactor Projects U.S. Nuclear Regulatory Commission Washington, DC 20555 Mr. Noel Dudley NRC Senior Resident inspector P.O. Ilox 1149 Scabrook, Nil 03874 INPO Records Center 1100 Circle 75 Parkway Atlanta, G A 30339
e New llarnpahire Yankre May 31,19(ji r~ctoson n to syy.,,,,y
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' NUREG 0896, Supplement Nos. 4 and 9, ' Safety Evaluation Report Related to the Operation of Seabrook Station', required that the following information be provided to allow the Staff to complete its review of the control room design review (TMI Action Plan item 1.D.1). A human factors review team consisting of an instrumentation & control (I&C) engineer, a human factors consultant, and an individual from the Operations Department who possesses l
a Senior Reactor Operator's License conducted this evaluation in accordance with the guidance provided in NUREG 0700, 'Ouidelines for Control Room Design Reviews *,
TI?M pER ATU R !!!IlUMIDITY/A IR Ft.OW The temperature / humidity survey revealed that the control room is maintained at
_70* Fahrenheit and approximately 40% relative humidity.
The temperature and humidity distributions were determined to meet or exceed the NUREG 0700 guidelines. Additionally, the air quality and velocity were. determined to meet or exceed the NUREG guidelines. No findings resulted from this review.
ACOUSTICS / AUDITORY SIGNAL,S During the acoustic review. It was determined that the background noise level was well below the maximum acceptable level of NUREG 0700. In addition, noise distractions, reverberation, signal meaning, arditory coding, direction of sound, frequency, and propagation of signals were determined by the review team to meet or exceed the NUREG guidelines.
One finding resulted during this review. Specifically, the fire alarm panel horn was not in the primary operating area and the tone was less than 10 db above background as required by NUREO 0700 when measured in the primary operating area. As a result of this finding, the fire panel alarm horn will be moved te the primary control area during the first refueling outage.
Subsequent to the relocation of the alarm horn, the tone will be adjusted to produce a tone between 10 and 20 db above -normal ambient background in the primary operating areu.
LIGitTING The lighting survey included a review of the normal lighting, the ac and de emergency lighting, and the de-only emergency lighting. The lighting survey revealed that the ambient lighting levels are uniform throughout the control room and are within the recommended limits of NUREG 0700.- The overall normal and emergency lighting was determined by the review team to meet or exceed the NUREG guidelines. In addition to the overall lighting levels, the luminance ratio and reflectance were calculated and determined to meet or exceed the NUREG guidelines. However, a shadow line was found to exist along the main control board approximately six feet 'above the floor and some minor glare was found on'some meters along the shadow line. The shadow and glare were determined by the review team to be a minor inconvenience that does not impair the operator's ability to read the meters and has no safety signifier.nce.
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