ML20245H570
| ML20245H570 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/10/1989 |
| From: | Medford M TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20245H574 | List: |
| References | |
| NUDOCS 8908170180 | |
| Download: ML20245H570 (2) | |
Text
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4 TENNESSEE VALLEY AUTHORITY CHATTANOOGA TENNESSEE 37401 6N 38A Lookout Place AUG 101989 TVA-SQN-TS-89-37 10 CFR 50.90 U.S. Nuclear Regulatory Commission ATTN: ' Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter of
)
Docket Nos. 50-327 Tennessee Valley Authority
)
50-328 SEQUOYAH NUCLEAR PLANT (SQN) - TECHNICAL SPECIFICATION (TS) CHANGE 89 ADDITIONAL INFORMATION The subject TS change, which was submitted to NRC on August 7, 1989, requested an amendment to licenses DPR-77 and DPR-79 to change the TSs of SQN Units 1 and 2.
The proposed change adds action statements to address the failure to meet the surveillance requirements for cold leg accumulator water level and pressure instrumentation.
TVA determined that, because of the condition identified in our August 7, 1989, submittal (i.e., the potential for unit derating enforcement action caused by interpretation problems with the timeframes available to correct equipment problems), sufficient time does not
. exist for a 30-day period to allow public comment.
TVA, therefore, requested that this change be given emergency processing priority.
Upon review of the TS change package, NRC questioned the wording of the proposed action statements.
NRC stated that the proposed wording represented a generic change and, therefore, could not be granted on an emergency basis.
During telephone discussions held on August 8 and 9, 1989, between TVA and NRC, TVA agreed to submit revised wording for the proposed change.
It was further agreed that the proposed change would be granted on a temporary basis to allow NRC to review a permanent change on a generic basis.
Enclosed are revised TS pages to be used in the subject TS change.
The revised wordirg contained in the enclosure does not affect the justification for the TS change provided in the August 7, 1989, submittal.
The environmental impact evaluation and significant hazards evaluation also remain valid and unchanged.
In addition to the change in wording, NRC also requested that TVA perform a i
l calculation to establish a correlation between pressure changes and water level changes caused by assumed leakage from the cold leg accumulators.
This i
calculation was performed using the ideal gas law assuming isothermal conditions (valid for slow leaks). The calculation showed that, for initial accumulator water volumes that varied from the high TS allowable limit to the f
low TS allowable limit, the leakage required to produce a pressure drop of 35 pounds per square inch (difference between the high and low alarm setpoints for pressure) varied from 182.5 gallons to 202.0 gallons of water. This change in water volume is equivalent to approximately 2.5 percent of the nominal water volume.
It should be noted that water is routinely added (monthly) to the accumulators to maintain nominal operating levels.
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'U.S.' Nuclear Regulatory Commission j
L PI' ease direct questions concerning this issue to B. S. Schofield at.
.(615) 843-6172.
.Very truly yours, j
TENNESSEE VALLEY AUTHORITY
' Mark 0. Medford', Vice President and Nuclear Technical Director Enclosure cc: Ms. S. C. Black, Assistant Director (Enclosure) i
-for Projects l
TVA Projects Division U.S. Nuclear Regulatory Commission-One White Flint, North
-11555 Rockville Pike Rockville,' Maryland 20852 Mr. B. A. Wilson, Assistant Director (Enclosure) for Inspection Programs.
1 TVA' Projects Division l
U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 I
Atlanta, Georgia-30323 Mr. Michael H. Mobley, Director Division of Radiological Health T.E.R.R.A. Building 150 9th Avenue, N Nashville, Tennessee 37203 NRC Resident. Inspector (Enclosure)
Sequoyah Nuclear Plant 2600 Igou Ferry Road
.l Soddy Daisy, Tennessee 37379 l
American Nuclear Insurers (Enclosure)
. Attention:. Librarian The Exchange, Suite 245 270 Farmington Avenue i
Farmington, Connecticut 06032 I
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