ML20012B044
| ML20012B044 | |
| Person / Time | |
|---|---|
| Issue date: | 02/28/1990 |
| From: | Chris Miller Office of Nuclear Reactor Regulation |
| To: | Wylie C Advisory Committee on Reactor Safeguards |
| References | |
| PROJECT-669A NUDOCS 9003130352 | |
| Download: ML20012B044 (3) | |
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pm 81 NUCLEAR REGULATORY COMMISSION
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. wassiwoTon, o. c. nosss February 28, 1990
' Project No. 669 I
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- Mr. Charles Wylie, Chairman
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Subcomittee on.' Improved Light Water Reactors i
' Advisory Comittee.on Reactor Safeguards.
United States Nuclear Regulatory Comission 1
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Dear Mr. Wylie:
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SUBJECT:
DRAFT SAFETY EVALUATION REPORT REGARDING CHAPTER 5 0F THE ALWR REQUIREMENTS. DOCUMENT Enclosed are 20 copies f the staff's draft safety evaluation report (DSER) i o
discussing the status of its review of Chapter 5 of the ALWR Requirements
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Docurnent which was submitted by letter dated December 8,1987. A copy of this e
DSER was forwarded to the Comission in SECY-89-228,' dated Vuly 28, 1989.
Key issuesJin'the Chapter 5 review include:
.EPRI's ALWR public safety goal severe-accident' prevention and mitigation-severe-accident containment. performance criteria-hydrogen generation and control
' source-term issues fire: protection high/ low-interface design-.
anticipatedtransientswithoutscrams(ATWS) l operation of residual heat removal (RHR) system with reduced reactor coolant' system inventory
' station blackout core-concrete interaction - ability to cool' debris high-pressure core-melt ejection L $
-; equipment survivability
' inservice testing.of pumps and valves resolution of certain generic safety issues 5
JBased on its review, the staff has concluded that there are open issues that H
' require satisfactory resolution before the ' staff can complete review of A
' Chapter '5~ of the ALWR Requirements Document., These issues are discussed in
' detail 11n the enclosed report' (see Section 1.4 of the report for a.sumary of 4
- issues).
' Appendix D of'the DSER provides an analysis detailing where the staff proposes z
departure frora current regulations or where the staff is substantially supplemen-ig((Aft
' ting.or: revising = interpretive guidance applied to currently-licensed LWRs.
For v'
those issues discussed in Appendix D,:the Comission is reviewing the basis j
for the: approach that the staff is pro)osing, and-accordin ly, may at some
- future point in the review-determine' tiat such issues invo ve policy questions ~
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. Mr. Charles Wylie 2-February 28, 1990
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that the Comission may wish to consider. These issues are considered funda-i
. mental to agency decisions on the acceptability of the evolutionary ALWR 3
. designs.
For easy identification, the staff's positions regarding these r
. issues have been underlined in Appendix D and have been cross-referenced with
- the other sections in the DSER in which they are discussed.
These copies are being 3rovided to inform the ACRS members and staff of our I
progress in reviewing tie Requirements Document. Note that changes have been made to the DSER since the issuance to the Commission in SECY-89-2?8 to reflect the
. positions taken in SECY-90-016. " Evolutionary LWR Certification Issues and Their Relationship to Current Regulatory Requirements," January 12, 1990, to update the status of the review of certain items, and to make editorial and
. typographical error corrections.
If you have any questions concerning this matter, plesse contact the project manager, Thomas Kenyon, at (301) 492-1120.
)
l Sincerely,
,Yb Y' N Charles L. Miller, Director Standardization and Life Extension Project Directorate Division of Reactor Projects - III, IV V and Special Projects Office of Nuclear Reactor Regulation
Enclosure:
- As stated E
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bf Mr. Charles Wylie-February 28, 1990
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that the Comission may wish to consider. These issues are considered funda-mental to agency decisions on the acceptability of the evolutionary ALWR designs. -for easy identification, the staff's positions regarding these issues have been underlined in Appendix D and have been cross-referenced with the other sections in the DSER in which they are discussed.
These copies are being arovided to inform the ACRS members'and staff of our progress in reviewing tie Requirements Document. Note that changes have been made to the DSER since the issuance to the Comission in SECY-89-228 to reflect the positions taken in SECY-90-016. " Evolutionary LWR Certification Issues and Their Relationship to Current Regulatory Requirements," January 12, 1990, to update the status of the review of certain items, and-to make editorial and.
typographical error corrections.
If you have any questiens concerning this matter, please contact the project manager, Thomas Kerlyon, at (301) 492-1120.
Sincerely,
/s/
Charles L. Miller, Director Standardization and Life Extension
'l Project Directorate L
Division of keactor Projects - III,.IVJ
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V and Special Projects j
H Office of Nuclear Reactor Regulation l:
Enclosure:
As' stated.
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