ML20196B789
| ML20196B789 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 11/23/1998 |
| From: | Beasley J SOUTHERN NUCLEAR OPERATING CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-98-02, GL-98-2, LCV-1272, NUDOCS 9812010184 | |
| Download: ML20196B789 (3) | |
Text
-,.
J. Barnie Beasley, Jr., P.E.
$mrthern Nuclear Vice President Operating Company,Inc.
Vogtle Project 40 inverness Center Parkway P.O Box 1295 Birmingharn, Alabama 35201 Tel 205.992.7110 Fax 205 992.0403 SOUTHERN COMPANY Energy:o Serve hur%rld" November 23, 1998 LCV-1272 Docket Nos.: 50-424 50-425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington D. C. 20555-0001 Ladies and Gentlemen:
VOGTLE ELECTRIC GENERATING PLANT RESPONSE TO GL 98-02, LOSS OF REACTOR COOLANT INVENTORY AND ASSOCIATED POTENTIAL FOR LOSS OF EMERGENCY MITIGATION FUNCTIONS WHILE IN A SHUTDOWN CONDITION On May 28,1998 the NRC issued Generic Letter (GL) 9R-02 to request information necessary to assess licensee's susceptibility to a common-cause failure of their emergency core cooling system (ECCS) as a result of reactor coolant system (RCS) drain down while in a shutdown condition. Specifically, licensees were required to evaluate their susceptibility to an event similar to that which occurred at Wolf Creek on September 17,1994. During this event a portion of the RCS inventory was inadvenently pumped to the RWST lowering the RCS level and increasing the RWST temperature such that water flashed to steam in the common ECCS suction header. Had an ECCS actuation occurred I
this steam could have bound all of the ECCS pumps. This event was also the subject of O
Information Notice (IN) 95-03 dated January 12,1995. Provided as an attachment to this letter is the information requested by GL 98-02.
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Mr. J. B. Beasley, Jr. states that he is a Vice President of Southern Nuc' ear Oprrating Company (Southern Nuclear) and is authorized to exeme this oath on behalf of Southern Nuclear and that, to the best of his knowledge and belief, the facts set forth in this letter and attachment are true.
SOUTHERN '
E R O ERATING COMPANY Oy By:
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JTBedsley,[r.
Sworn to and subscribed before me this ) eday of [f'
,1998.
AsIz,221A,
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' Notary Public
~f4 'Ls My Con 1 mission Expires v
9812010184 981123 PDR ADOCK 05000424_.,
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i U. S. Nuclear Regulatory Commission Page 2 l
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Attachment l
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Southern Nuclear Operating Comoany i
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Mr. J. T. Gasser l
Mr. M. Sheibani SNC Document Management i
U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator i
Mr. D. H. Jaffe, Senior Project Manager, NRR
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Mr. J. Zeiler, Senior Resident Inspector, Vogtle
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ATTACHMENT
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VOGTLE ELECTRIC GENERATING PLANT RESPONSE TO GL 98-02, LOSS OF REACTOR COOLANT INVENTORY
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AND ASSOCIATED POTENTIAL FOR LOSS OF EMERGENCY
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MITIGATION FUNCTIO]iS WHILE IN A SHUTDOWN CONDITION
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Item 1 of GL 98-02 i
l Provide an assessment of whether your emergency core cooling systems include certain
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design features, such as common pump suction header, which can render the systems susceptible to common-cause failure as a result of events similar to the Wolf Creek RCS drain down event of September 17,1994.
SNC Response SNC conducted a thorough review of the ECCS piping and determined that the VEGP ECCS design is susceptible to the event that occurred at Wolf Creek.
Item 2 of GL 98-02 Prepare, with consideration of plant-specific design attributes, a description of the features ofyour Appendix B quality assurance program (for example, the methods used to verify valve position, the controls in place to assure compliance with plant surveillance, maintenance, modification and operating procedures, and the adequacy of operator training for such activities) that provide assurance that the safe.ty-related functions of the RH.R system and ECCS will not be adversely atTected by activities conducted at hot shutdown (such as occurred at Wolf Creek).
SNC Response A description of the programs, procedures and controls in place to preclude such an event is available at VEGP for review.
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