ML19095A264
| ML19095A264 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 04/14/1978 |
| From: | Stallings C Virginia Electric & Power Co (VEPCO) |
| To: | Case E Office of Nuclear Reactor Regulation |
| References | |
| Download: ML19095A264 (2) | |
Text
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e Vreo1NIA ELECTRIC AND PowER CoMPANY RICHMOND, VIRGIN IA 23261 April 14, 1978,
- Mr. Edson G. Case, Acting Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Conunission Washington, D. C.
20555
Dear Sir:
Serial No. 614A/121577 PO&M/DLB:das Docket Nos. 50-280 50-281 License Nos. DPR-32 DPR-37 In response to your request of December 15,.1977, completed questionnaires on Standby Diesel Generators were forwarded in our letter of January 23, 1978.
Two completed questionnaires *were forwarded; one for Surry Unit Nos. 1 and 2 and one for North Anna Unit No. 1.
In the questionnaire for Surry Unit Nos. 1 and 2, seven items were not filled in due to unavailability of data.
The missing information has been obtained and is included in the attachment to this letter.
Attachment Ver';( t.ruly;/)/ours,
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Attachment QUESTIONNAIRE FOR NUCLEAR REGULATORY co~~IISSION RELIABILITY STUDY OF STANDBY DIESEL GENERATOR UNITS SURRY POWER STATION UNIT NOS. 1 AND 2 The following information was not available at the time of our January 23, 1978 submittal.
Item numbers used are from the original questionnaire.
Item B.2 (p2):
ItemB.2 (p3):
Item B.2 (p4):
NOTE:
Item D.4a (p7):
"Minii.'Illilil air tank pressure for cranking:
90 psig "What is air pressure drop from air tank to engine during cranking?"
28 psi 11What is the time required to recharge one air tank?"
35 minutes from 50 psig to 210 psig.
Where questionnair~! refers to air "tank" we have interpreted this to mean "bank".
Each engine has two independent "banks" consisting of three "tanks"..
"Normal operating (oil) pressure:
75 psi.
Item L.3.a (pl4):
"Equilibrium (lube oil pressure):
75 psi.
Item 0.3.a.b (pl7): "... maximum speed surge when starting;" 965. rpm.
NOTE:
Frequency meter is not functional on starting and tachometer is not normally observed during start.
The figure reported is the result of observation of one start.
Item Q.5 (p18):
Inside switch gear hottest (Temperature): 85°F with ambient temperature 72.
NOTE:
Switchgear, voltage regulator and exciter are in the same cabinet.