ML20205P314
| ML20205P314 | |
| Person / Time | |
|---|---|
| Issue date: | 11/01/1988 |
| From: | Long W Office of Nuclear Reactor Regulation |
| To: | Chris Miller Office of Nuclear Reactor Regulation |
| References | |
| PROJECT-669A NUDOCS 8811080065 | |
| Download: ML20205P314 (5) | |
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION 5
E WASHINGTON, D. C. 20666 Ne/ ember 1, 1988 Project No. 669 NEMORANDUM FOR: Charles L. Stiller, Director Standardd:4 tion and Non-Power Reactor Project Directorate Division of Reactor Projects III, IV, Y and Special Projects FROM:
William O. Long, Senior Project Manager i
Standardization and Non-Power Reactor Project Directorate Division of Reactor Projects III, IV, Y and Special Projects
SUBJECT:
RECORD OF MEETING WITH EPRI TO DISCUSS NRC RECOMMENDATIONS FOR DESIGN OF ALWR ELECTRICAL SYSTEMS On October 26, 1988, Mssrs.W.Long(NRR/PDSNP and F. Rosa (NRR/SELB), met with Mssrs. Stephen Daubresse (MPR Associates))and Gary Vine (EPRI), at Whit Flint North to discuss staff reconnendations regarding the design of electric power distribution systems for advanced light water reactors. These reconnendations are described in the attached meeting handout. Mr. Rosa briefed the visitors on the SELB reconnendations, describing the objectiv.es and emphasizing that the one-line diagram is intended only as depicting one possible means of obtaining the desired objectives.
Following the briefing by Mr. Rosa, the visitors briefed the staff on EPRI's current approach to the design of the ALWR electric systen. They had in their aossession, a copy of the draft Chapter 11 "Electrical Power" of the ALWR Jtility Requireinents Document from which they showed the staff the proposed one-line diagrams. The one-line diagrams were different from the NRR p*oposal, however, it was obvious that the proposed design would also meet the staff objectives of eliminating fast transfers, providing diverse alternate power and blackout capability, perinitting off-line battery charging and providing separate DC power sources for each protection channel.
It is noted that EPRI's )ro sosed distribution system utilizes a three-tier functional approach wit 1 tie offsite power boards being at the first tier, the gas turbine generator loads the second tier, and the plant diesel loads being the third tier. Certain loads (i.e. instrument air compressor, reactor building HVAC, charging pumps) which by conventional practice are fed from the diesel boards but are not absolutely or innediately required for accident conditions, would be fed from the second tier. Mr. Rosa agreed that this basic approach is acceptable.
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CONTACT:
W. Long, NRR/PDSNP 492-1103 GG110SOO65 881101 6b A PDC
o November 1, 1988 2
EPRI noted that their draf t diagrams had not been reviewed and approved by the ALWR Steering Comittee and could therefore change prior to submittal to the staff. Chapter 11 is due to be submitted to the staff by the end of 1988.
The attendees agreed that the meeting was encouraging and beneficial.
/s/
William O. Long, Senior Project Manager Standardization and Non-Power Reactor Project Directorate Division of Reactor Projects - III, IV, Y and Special Projects
Attachment:
As stated
, DISTRIBUTION:
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NRC PDR PDSNP R/F WLong FRosa 0GC-Rockville EJordan BGrimes NRC Particpants ACRS(10)
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-2 EPRI noted that their draft diagrams had not been reviewed and approved by the ALWR Steering Comittee and could therefore change prior to submittal to the staff. Chapter 11 is due to be submitted to the staff by the end of 1988.
The attendees agreed that the meeting was encouraging and beneficial.
William O. Long, Senior Proj t Manager Standardization and Non-Power Reactor Project Directorate Division of Reactor Projects - III, IV, Y and Special Projects
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Attachment:
As stated
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w PREFERRED ALWR ELECTRICAL SYSTEMS DESIGN (REFER TO LINE DI AGRM4 - ATT ACHED)
Desicr. Forture Required By Coments 1.
Alternate: AC Source-(AAC):
SB0 Rule One AAC source Combustion Turbine or SRP required.
DG3 2.
Offsite Power Feed Configuration:
GDC-17 This is preferred Main Gen Lct.d Breaker 34, 35, configuration, r,o 2 - Unit Aux Trar.sformers ano 38; fast transfers, 2 - Startup Transformers SRP provides more thar.
minimum required 2 - separate offsite by GDC-17.
circuits to both safety buses 3.
Energency DGs:
GDC-17, If DG3 is provided CGI and DG2, with bus 34, 35 and 30; as AAC scurce, it interconnectability SRP would also be an inttalled spare EDG. Both DG3 and the Combustion Turbine arc recom-rerded; this would exceed minimum requirerents of Regulations.
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Batteries:
GDC-17 This is current 4 - Class IE IEEE Std 279 practice, exceeds 2 - r.on-Class IE SRP minirrun requirements of Regulations.
2 - Switchyard
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Enhanced Status !!onitoring GDC-17 1rprevement over of Batteries and Other IEEE Std 279 present practice.
Electrical Systems:
SRP A
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Notes:
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- 1. AAC Source: Comb Turb or DG3.
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no fast transfer.
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- 3. Two startup transforc:ers V80 V y
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- 4. DG Capacity: DGI, DG2, and 3
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shutdown load whichever is greater.
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- 5. Batteries: 4 Class IE (min 4 hr capacity),
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i 2 non-class IE, 2 switchyard; capability F
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i I,____________CM 5_5 _1 E - - - - - - - - - - - - - 3 ATTAClftENT PREFERRED ALilR ELECTRICAL SYSTEV DESTGN T
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