ML20196E568
| ML20196E568 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 02/26/1988 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8803010166 | |
| Download: ML20196E568 (8) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOG A. TENNESSEE 374o1 SN 157B Lookout Place IFl!B 261988 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
20555 centlemen:
In the Matter of
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Docket Nos. 50-327 Tennessee Valley Authority J
50-328 SEQUOYAH NUCLEAR PLANT (SQN) - ADDITIONAL INFORMATION FOR SQN UNIT 2 HYDROGEN ANALYLER SAMPLING VALVE RELIEF REQUEST During a January 27, 1988 telephone conference call between NRC and SQN Licensing Staff, NRC requested additional information with regard to a relief request for six solenoid-activated hydrogen analyzer sampling valves contained in SQN's In-Service Test (IST) Program.
In lieu of a visual observation requirement SQN, in a January 21, 1988 submittal, requested relief to perform an alternate pressure test to verify proper valve operation. To support NRC review and concurrence with this relief request, SQN is providing the requested information that details the proposed alternate pressure test methods in attachment A to enclosure 1.
The commitment for incorporating the alternate pressure test method into SQN's Surveillance Instruction (SI) 166.4 is listed in enclosure 2.
TVA's Jantiary 1988 submittal contained relief request PV-15 that included two hydrogen analyzer sampling valves, FSV-43-200A and FSV-43-210A.
By design, these two valves will not be provided with lights for remote indication and are therefore being removed from the previously submitted PV-15 relief request. Attachment B to enclosure 1 contains the newly revised PV-15 along with the newly revised Appendix C to SQN's valve program (reference SQN's Final Safety Analysis Report, section 6.8).
Eecause NRC approval of this relief request is required for unit 2 restart (before mode 2), TVA requests that this additional information be expediently reviewed and a Safety Evaluation Report (SER) be issued to address the subject relief request.
If an SER cannot be completed to tupport plant restart, a written response documenting NRC review and concurrence with SQN's relief request would be beneficial. Upon receipt of either an SER oe NRC concurrence, SQN will change its valve progenm to be consistent with NRC's approved position, h0 8803010166 880226 PDR ALOCK 0500G327 i\\
P Pm An Equal Orpcitemty Empoyer
.. U.S. Nuclear Regulatory Connission if you have any questions concerning this issue, please telephone M. R. Harding at (615) 870-6422.
Very truly youes, TENNESSEE VALLEY AUTHORITY R.
ridley, D rector Nuclear Lice sing and Regulator Affairs cc: (Enclosures):
Mr. K. P. Barr, Acting Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. C. G. Zech, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission one White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Sequoyah Resident Inspletor Sequoyah Nuclear Plant j
2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 l
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ENCLOSURE 1 Attachment A ALTERNATE TESTING FOR til!T 2 HYDROGEN ANALYZER SAMPLING VALVES FSV-43-201. -202. -207. -208 In lieu of a visual observation requirement SQN requested relief to perform an alternate pressure test to verify proper operation. The following steps l
provide a simplified description of SQN's alternate test methods. This alternate test method will be incorporated into SQN's Carve 111ance Instruction (SI) 166.4 for testing the subject valves during unit 2 restart (before mode 2).
(Refer to the ifydrogen Analyzer System Schematic)
TRAIN B VALVES 1.
FSV-43-208 a.
Attach test rig with air supply to point A.
b.
Close manual valve #3.
c.
Open Test Connection (TC) #5.
d.
Pressurize test rig to 13 PSIG.
e.
Open FSV-43-208 and verify a pressure drop, f.
Close FSV-43-208 and verify test rig pressure returns to 13 PSIG.
g.
Verify test rig pressere remains steady at 13 PSIC.
h.
Remove test rig and return valves to normal position.
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2.
FSV-43-201 a.
Attach test ris with air supply to point B.
b.
Close manual valve #4.
c.
Open TC #6.
d.
Pressurize test rig to 13 PSIG.
e.
Open FSV-43-207 and verify a pressure drop.
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f.
Close FSV-43-207 and verify test rig pressure returns to 13 PSIC.
g.
Verify test rig pressure re.nains steady at 13 PSIC.
h.
Remove test rig and return valves to normal position.
The train A valves will be tested in a similar faahlon as the train B va'ves.
f Un.h 2.
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ENCLOSURE 1 Attachment B Revised Relief Reque M -15 with Revised Appendix C to SON's Ip-Service Valve Test Pronram (SON Final Safety Analysis Report. Section 6.8 r
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Function:
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Impractical D
Requirement:
Observe valve movement every two years to verify-remote valve indicators accurately reflett valve operation.
Basis for Relief:
These solenoid actuated valves are totally enclosed, i
and valve position cannot be detemined visually.
Alternate
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Pressure indicators will be used to independent.tv verify i
valve operation.
Frequency fcr Alt Testing:
Every 2 years.
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.... s ENCLOSURE 2 Conwnt tment 1.
SQN's alternate pressure test method, as outlined in enclosure 1, will be incorporated into SQN's SI-166,4, "Remote Valve Position Indication Verification." This action will be completed before unit 2 restart (mode 2).
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