ML20125B039
| ML20125B039 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 06/04/1985 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| 2NRC-5-084, 2NRC-5-84, NUDOCS 8506110285 | |
| Download: ML20125B039 (4) | |
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'Af 41 ) 787-5141 (412)9234 960 Nuclear Construction Division Telecopy (412) 787 2629 Robinson Plaza. Building 2, Suite 210 Pittsburgh, PA 15205 4, MM United States Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Mr. George W. Knighton, Chief Licensing Branch 3 Of fice of Nuclear Reactor Regulation
SUBJECT:
Beavar Valley Power Station - Unit No. 2 Docket No. 50-412 Revised PSB Mechanical Responses Gentlemen:
This letter provides a revised discussion of lighting and communica-tions originally provided in letter 2NRC-5-056 dated March 27, 1985.
As requested in a telephone conversation with PSB on May 13, 1985, this revision provides a brief discussion of the normal power source reliability.
DUQUESNE LIGHT COMPANY By Q. Carey V~
Vice President GH0/wjs Attachment cc:
Mr. R. DeYoung, Director (3) (w/a)
Mr. B. K. Singh, Project Manager (w/a)
Mr. G. Walton, NRC Resident Inspector (w/a)
INPO Records Center (w/a)
NRC Document Control Desk (w/a)
SUBSCRIBED AND SWO TO BEFORE ME THIS 8506110285 850604 3,,f) DAY OF
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, 1985.
PDR ADOCK 05000412 Ltml)
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ANITA ELAINE REITER, NOTARY PUBUC ROBINSON TOWNSHIP, ALLEGHENY COUNTY MY COMMISSION EXPIRES OCTOBER 20,1986 I l g
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U:itcd Stctes Nuciscr Rsgulctory Commission Mr. George W. Knighton, Chief Revised PSB Mechanical Response Page 2 COMMONWEALTH OF PENNSYLVANIA )
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. COUNTY OF ALLEGHENY
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On this J,[ day of
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Notary Public in and for said Cobnwealth and County, personally appeared J.
J. Carey, who being duly sworn, deposed and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth in the Submittal are true and correct to the best of his knowledge.
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Notary Public' ANITA ELAINE REITER, NOTARY PUBLIC '
ROBINSON TOWNSHIP, ALLEGHENY COUP.TY MY COMMISSION EXPIRES OCTOBER 20,1984 l
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Lighting and Communications The general bases for the design of the BVPS-2 lighting and communications systems follow the basic design criteria of the BVPS-1 lighting and communi-cation systems.
The systems are des igned to provide ef fect ive, reliable communications between the safe shutdown control stat ions and other task areas of BVPS-2 during transient, fire, and accident conditions, including the loss of of fsite power.
The system description for communications is detailed in FSAR Sect ion 9.5.2.
A listing of station areas and the types of communications systems availabe in the various areas is given in the res ponses to FSAR question 430.56.
A discussion of the power supplies is dotalled further in the response to FSAR question 430.68.
Additional information about the communication systems is given in the responses to FSAR questions 430.57, 430.58, 430.59, and 430.60.
The system description fo r lighting is detailed in FSAR Section 9.5.3.
A listing of station areas and the types of lighting systems available in the various areas is given in the responses to FSAR question 430.61. A discussion of the power supplies is detailed further in the response to FSAR questions 430.63 and 430.66.
A discussion of illumination levels is given in the res ponse to FSAR question 430.65.
Additional information is given in the responses to FSAR questions 430.62, 430.64, and 430.67.
Defense in depth is provided at BVPS-2 by the various types of communication systems powered by a number of sources which are detailed in FSAR Section 9.5.2.
Similarly, defense in depth is provided by the various types of lighting systems powered by a number of dif ferenet sources, which are detailed in FSAR Section 9.5.3. The installation of these integrated lighting and communication systems ensures that BVPS-2 will have ef fect ive and reli-able lighting and communications during transients, fires, and accident conditions, including the loss of of fsite power.
Normal power is provided through the switchyard when the unit is not operat-ing.
As shown in Figure 8.1-1 of the FSAR, numerous offsite lines connected to the switchyard provide a high degree of confidence that of fsite power will be available.
Experience on BVPS-1 has been that the only loss of of f aite power resulted from a trans fo rmer explosion and power was res to red in 17 minutes (see NUREG/CR 3992 Table A.1).
DLC letter 2NRC-5-024 (dated February 13, 1985) provided additional informa-tion relating to the non-safety diesel which supplies backup power to some of the lighting and communication systems.
The non-safety diesel building con-forms to applicable state and national building codes. The power cables from this building to the BVPS-2 plant are routed underground.
A 30,000 gallon (7-day) supply, two fuel pumpe, and a 270 gallon day tank provide fuel to the non-safety diesel. NUREG-0696 and NUREG-0737 requirements were factored into the design of the system.
Many of the attributes were factored into the design of the system.
Many of the attributes in Reg. Guide 1.137 are paral-1eled by ERF/TMI NUREGS.
Maintenance and testing of the nonsafety diesel and batteries will be similar to that performed on comparable safety related diesels and batteries.
3.: The ~ multiple systems, described above and in the referenced documents, together with the diverse, multiple power sources, and the seismic mounting of many components provide a high degree of assurance that sufficient lighting - and communications will be available to facilitate safe shutdown even in the unlikely event of a loss. of of f-site power concurrent with a design basis event.
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