ML17062B137
| ML17062B137 | |
| Person / Time | |
|---|---|
| Site: | Hatch, Perry  |
| Issue date: | 06/06/1996 |
| From: | Matthews D NRC (Affiliation Not Assigned) |
| To: | Donovan K CENTERIOR ENERGY |
| Shared Package | |
| ML17062B138 | List: |
| References | |
| PROJECT-691 TAC-M89489, TAC-M89629, NUDOCS 9606200160 | |
| Download: ML17062B137 (4) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHIMGTOH, D.C. as055&4001 June 6,
1996 Kevin P.
Donovan Centerior Energy Perry Power Plant HC A210 P. 0.
Box 97
- Perry, OH 44081
SUBJECT:
ACCEPTANCE OF PROPOSED HODIFICATIONS TO THE BOILING WATER REACTOR (BWR)
EHERGENCY PROCEDURE GUIDELINES (TAC NOS.
H89489 AND H89629)
Dear Hr. Donovan:
The staff has completed its review of: (1) your submittal transmitted by letter (BMROG-94038) dated March 21, 1994, requesting our approval of proposed modifications to the BMR Emergency Procedure Guidelines (EPGs)
(NEDO-31331) to address reactor core instabilities; and (2) the Operations Engineering, Inc.,
(OEI) Document 9402-3, "The Hanagement of ATWS by Boron Injection and Water Level Control," submitted by letter (BWROG-94111) dated September 16, 1994.
OEI Document 9402-3 gives the analyses used by BMROG to justify its ATWS control strategy..
The staff has also reviewed the BMROG submittal transmitted by letter (BWROG-95078) dated September 15,
- 1995, responding to the staff's request for comments on a draft safety evaluation report (SER).
The draft SER was p1aced in the Federa1
~ne ister for comment and copies were transmitted with an invitation for comment to other interested parties.
The final SER,
- enclosed, reflects modifications made in response to BWROG and ACRS comments (no other comments were received) and defines the basis for the'taff's acceptance of the proposed EPG modifications.
Both the staff and the ACRS agree that, for BWRs injecting standby liquid control through a standpipe below the core, maintenance of level above top-of-active fuel (TAF) is the superior water level control strategy in an anticipated transient without scram (ATMS) event.
The staff recommends a
level around TAF +5 feet (1.52 m), or as high as possible, while still maintaining the level at least 2 feet (0.61 m) below the feedwater sparger.
Although control at any level between the minimum steam cooling water level and 2 feet below the feedwater sparger was found to be acceptable, both the staff and ACRS urge that a high-water-level control strategy be adopted.
Additional details are contained in the enclosed SER.
The staff is sending a copy of this letter and the enclosed SER to all BWR licensees and understands that all BMR licensees will revise their emergency operating procedures consistent with the approved modifications.
The suggested implementation program contained in Enclosure 1 to the staff's September 12, 1988, letter to the BWROG transmitting the SER on NED0-31331, Revision 4 remains applicable.
The staff requests that the BWROG monitor the progress of implementation and inform the NRC of the number of plants completing implementation and the number selecting each water level option.
K. Donovaw June 6,
1996 The staff does not intend to repeat its review of the matters found acceptable, as described in the enclosed
- SER, on the proposed modifications for NED0-32331, except to ensure that the material presented is applicable to the speci&'c plant involved.
In accordance with proce'dures established in NUREG-0390, "Topical Report Review Status," the staff requests that the BMROG publish an accepted revision of this report within three months of receipt of this letter.
The accepted revision should incorporate this letter and the enclosed Safety Evaluation, including the attached technical evaluation report.
The accepted revision should inc')@de an -R (designating accepted) following the report identification designation.
Sincerely, I/
~
~ ~t Y!
- ~~i David B. Matthews, Chief Generic Issues and Environmental Projects Branch Office of Nuclear Reactor Regulation Project No 691
Enclosure:
As stated cc:
see attached list
Boiling Water Reactor Owners Group cc:
C.
D. Ter ry Vice President, Nuclear Engineering Niagara Mohawk Power Corporation Nine Mile Point-2 PO Box 63
- Lycoming, NY 13093 D. B. Fetters PECO Energy Nuclear Group Headquarters NC 62C-3 965 Chesterbrook Blvd.
One Upper Pond Road Parsippany, NJ 07054 S. J. Stark GE Nuclear Energy 175 Curtner Ave, H/C 165 San Jose, CA 95125 T. J.
Rausch Commonwealth Edison Company Nuclear Fuel Services 1400 Opus Place, 4th Floor ETWIII Downers Grove, IL 60515
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