ML19253B807
| ML19253B807 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 08/24/1979 |
| From: | Baer R Office of Nuclear Reactor Regulation |
| To: | Crews E SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 7910220265 | |
| Download: ML19253B807 (5) | |
Text
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f AUG 2 41979 Docket Nos. 50-395 Mr. E. H. Crews, Jr., Vice President and Group Executive - Engineering and Construction South Carolina Electric & Gas Company P. O. Box 764 Colunbia, South Carolina 29218
Dear Mr. Crews:
SUBJECT:
SECONDARY WATER CHEMISTRY CONTROL (Virgil C. Sumner Nuclear Station, Unit 1)
In 1 ate 1975 we incorporated provisions into the Standard Technical Speciff-cations (STS) that required limiting conditions fcr operation and surveillance requirements for secondary water chemistry parameters. The pr: posed Technical Specifications for your plant (s), as well as for other Pressurized Water Plants that have been issued an Cperating License since 1974 or are now under review for an Operating License, contain either these provisions or a requirement to establish these provisions after baseline chemistry conditions have been detemined. The intent of the provisions was to provide added assurance that tne operators of newly licensed plants would properly monitor and control secondary water chemistry to limit corrosion of steam generator tubes.
In a number of instances the Technical Specifications have significantly restricted the operational flexibility of some plants with little or no benefit with regard to limiting corrosion of steam generator tubes. Based on this experience and the knowledge gained in recent years, we have concluded that Technical Specification limits are not the most effective way of' assuring that steam generator tube corrosion will be minimized.
Due to the complexity of the corrosion phenomena involved and the state-of-the-art as it exists today, we believe that, in lieu of Technical Specf fications, a more effective approach would be to institute a license condition that requires the implementation of a secondary water chemistry monitoring and control program containing appropriate precedures and admin-istrative controls.
1150 048 79109 2 0 E 0
2-Mr. E. H. Crews, J r.
Ayn i 4 979 The required program and procedures would be developed by the licensee (or applicant) with any needed input from their reactor vendors or other consultants, and thus could more readily account for site and plant-specific factors that affect chemistry conditions in the steam generators.
In our view, plant operation following such procedures would provide assurance that licensees would devote proper attention to controlling secondary water chemistry, while also providing the needed flexibility to allow them to deal more effectively with any off-normal conditions that might arise.
Consequently, we request that you amend your FSAR to include ycur proposed secondary water chemistry program which will be referenced in a condition to your operating license and will replace any proposed Technical Specifi-cations on secondary water chemistry. A model license condition is enclosed.
We have concluded that such a license condition, in conjunction with existing Technical Specifications on steam generator tube leakage and inservice inspec-tion, would provide the most practical and comprehensive means of assuring that steam generator tube integrity would be maintained.
If you have any questions, please contact us.
Sincerely, L
Robert L. Baer, Chief Light Water Reactors Branch flo. 2 Division of Project Management
Enclosure:
Model License Condition cc w/ enclosure:
See next page
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Mr. E. H. Crenc, Jr., Vice President and Group Executive - Engineering and Construction South Carolina Electric & Gas Company P. O. Box 764 Columbia, South Carolina 29218 cc:
Mr. H. T. Babb
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General Manager - Nuclear Operations South Czrolina Electric & Gas Company P. O. Box 764 Colunbia, South Carolina 29218 G. H. Fischer, Esq.
Vice President & General Counsel South Carolina Electric & Gas Company P. O. Box 764 Col tmbia, South Carolina 29218 Mr. Willian C. Hescher President & Chief Executive Officer South Carolina Public Service Authority 223 North Live Oak Crive Moncks Corner, Scuth Carolina 29461 Mr. William A. Williams, Jr.
Vice President South Carolina Public Service Authority 223 North Live Oak Drive Moncks Corner, South Carolina 29461 Wallace S. Murphy, Esq.
General Counsel South Carolina Public Service Authority 223 tbrth Live Oak Drive Moncks Corner, South Carolina 29461 Troy B. Conner, Jr., Esq.
Conner, Moore & Corber 1747 Per.nsylvania Avenue, N. W.
Washington,D. C.
20006 Fr. Mark B. Whitaker, Jr.
Licensing and Staff Engineer Scuth Carolina Electric & Gas Canpany P. O. Box 764 Colunbia, South Carolina 29218 Mr. C. W. Dixon Group Manager, Production Engineering Scuch Carolina Electric & Gas Canpany P. 0. Box 764 Col unoia, South Carolina 29 2 i8 1150 050
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Mr. E. H. Crews, Jr.
cc: M. Brett Allen Bursey Route 1 Box 93C Little Mountain, South Carolina 29076 O
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1150 051
ENCLOSURE
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MODEL LICENSE CONDITION SECONDARY WATER CHEMISTRY MONITORING The licensee shall implement a secondary water chemistry monitoring program in accordance with (reference Licensee's Procedure) to inhibit steam generator tube degradation. This program includes:
1.
Identification of a sampling schedule for the critical parameters cnd of control points for these parameters; 2.
Identification of the procedures used to measure the value of the critical parameters; 3.
Identification of process sampling points; 4.
Procedure for the recording and management of data; 5.
Procedures defining corrective actions for off-control poin*, chemistry conditions; and 6.
A procedure identifying (1) the authority responsible for the interpretation of the data and (2) the sequence and tiining of administrative events required to initiate corrective action.
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