ML20235A550
| ML20235A550 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 01/06/1988 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| GL-85-03, GL-85-3, SL-3901C, TAC-66471, NUDOCS 8801120318 | |
| Download: ML20235A550 (3) | |
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Georg a Power Company 333 Piedmont Aven e u
Atlanta. Georg:a 30308 Telephone 404 526-6526 Mathng Address Post Off 4ce Box 4545 Atlanta. Georg;a 30302 Georgia Power L T. Guewa N ' 1 # N "' NI 4 !>"""
Manager Nuclear Safety and Licensing SL-3901c 0083I X7GJ17-H600 January 6, 1988 U. S. Nuclear Regulatory Commission t-ATTN: Document Control Desk
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Hashington, D. C.
20555 PLANT HATCH - UNIT 2 NRC DOCKET 50-366 g
OPERATING LICENSE NPF-5 RE0 VEST FOR EXEMPTION FROM 10 CFR 50.62(c K41 Gentlemen:
i In accordance with 10 CFR 50.12(a), Georgia Power Company (GPC) hereby requests an exemption from the requirements of 10 CFR 50.62(c)(4).
The Plant Hatch NRC Licensing Project Manager has verbally requested that GPC submit this exemption request in order to facilitate NRC approval of Plant Hatch Unit 2 Technical Specification (TS) changes, submitted by letter of September 22, 1987.
These changes were proposed to reflect NRC required plant modifications due to new regulations addressing anticipated transients without scram.
A final rule addressing
" Reduction of Risk from Anticipated Transients Hithout Scram (ATHS) Events for Light Hater Cooled Nuclear Power Plants", 10 CFR 50.62, was published on June 26, 1984.
Paragraph (c)(4) of this regulation states, in part:
Each boiling water reactor must have a standby liquid control system (SLCS) with a minimum flow capacity and boron content equivalent in control capacity to 86 gallons per minute of 13 weight percent sodium pentaborate solution.
NRC Generic Letter 85-03, issued January 28, 1985, stated that the
" equivalent in control capacity" wording in the above paragraph was chosen to allow fl exi bili ty in the implementation of the requirement, including differences in flow
The NRC subsequently approved methodology providing alternative means to achieve the
" equivalent 8801120318 880106
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k Georgia Power n U. S. Nuclear Regulatory Commission January 6, 1988 Page Two l
control capacity" (Safety Evaluation of Topical Report (NEDE-31096-P)
' Anticipated Transients Without Scram:
Response to ATHS Rule, 10 CFR l
50.62', October 21, 1986).
However, the NRC has now determined that I
since the flow rate and concentration requirements of 10 CFR 50.62(c)(4)
I do not specifically reference reactor vessels of 251 inches irside diameter, equivalent requirements based on smaller vessel size, although l
approved by NRC in the above Safety Evaluation, will require issuance of l
an exemption to the regulation.
l l
Plant Hatch Unit 2 has a reactor vessel measurin 218 inches in inside diameter.
GPC has chosen to meet the ATHS requirement by using sodium pentaborate enriched to 60 atomic percent boron-10, with a sodium pentaborate weight percent in solution of 6.2% to 13%, depending on volume of solution, and a minimum injection rate of 41.2 gallons per minute.
These parameters provide equivalency to the requirements of l
10 CFR 50.62(c)(4), and were developed according to the NRC approved l
Topical Report referenced above.
Paragraph (a)(2)(ii) of 10 CFR 50.12 provides that the Commission can
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consider granting an exemption in the event of special circumstances, j
including those where application of the regulation in the particular circumstances would not serve the underlying purpose of the rule, or is not necessary to achieve the underlying purpose of the rule.
In this 1
case, application of the specific requirements of 10 CFR 50.62(c)(4) l (which are based on a 251 inch vessel size) is not necessary to serve the l
underlying purpose of the ATHS rule for plants with a 218 inch vessel size.
Furthermore, granting of this exemption is authorized by law, will l
not present an undue risk to the public health and safety, and is consistent with the common defense and security.
Based on the above, Georgia Power Company hereby requests an exemption from the requirements of 10 CFR 50.62(c)(4).
If you have any questions in this regard, please contact this office at any time.
l Sincerely, l
N
-C-L. T. Gucwa RE8/lc c:
see next page
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Georgia Power h l
l U. S. Nuclear Regulatory Commission January 6, 1988 Page Three c: Georaia Power Comoany Mr. J. P. O'Reilly, Sr. Vice President - Nuclear Operations Mr. J. T. Beckham, Jr., Vice President - Plant Hatch GO-NORMS U. S. Nuclear Regulatory Commission. Washington. D. C.
Mr. L. P. Crocker, Licensing Project Manager - Hatch U. S. Nuclear Regulatory Commission. Region II Dr. J. N. Grace, Regional Administrator Mr. P. Holmes-Ray, Senior Resident Inspector - Hatch 2
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