ML20032D851
| ML20032D851 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 10/30/1981 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8111180139 | |
| Download: ML20032D851 (3) | |
Text
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D [RIBUTION:
ocket File NRC PDR Local PDR Docket Hos. 50-259 ORB #2 Rdg.
50-260 D, Eisenhut DCT 3 01981 50-296 J. Heltemes, AE00 T. Ippolito S. Norris R. Clark Mr. Hugh G. Parris OELD Manager of Power I&E (3)
Tennessee Valley Authority NSIC 500A Chestnut Street, Tower II TERA Chattanooga, Tennessee 37401 ACR (lj)
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Dear Mr. Parris:
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SUBJECT:
REACTOR PROTECTION SYSTEM (RPS) POWER MONITORING SYS
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MODIFICATION i
NOV0 31981* q)
RE:
BROWNS FERRY PLANTS, UNITS 1, 2. AND 3 commes y
t, By letter dated July 1,1981 you submitted design information for( e subjec vfd %(,
modification that you intend to install at your Tacility. We have L
this information and find that, to complete our evaluation, we will re re the additional inforination requested in enclosure (1), Please provide this information within 120 days.
Enclosure (2) forwards, for your consideration, model Technical Specifications for Electric Power Monitoring for RPS. Submittal of the proposed Technical Specifications for this modification should be in the form of requests for modification of your licenses accompanied by appropriate fees.
This request for information was approved by OMS under clearance number 3150-0011 which expires December 31, 1983. Comments on burden and duplication may be directed to the Office of Management and Budget, Reports Management.
Room 3208, New Executive Office Building, Washington, D.C.
20503.
Thank you for your cooperation.
Sincerely, ORIGINAL SIGNED BY Thomas A. Ippolito, Chief Operating Reactors Branch #2 Division of Licensing
Enclosures:
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4 Mr. Hugh G. Parris cc:
H. S. Sanger,.Jr., Esquire General Counsel Tennessee Valley Authority.
400 Commerce Avenue E 11B 33 C Knoxville, Tennessee 37902 Mr._Ron Rogers Tennessee Valley Authority
. 400 Chestnut Street, Tower II.
Chattanooga, Tennessee37401 - -
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Mr: 1H. N. Culver
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400 Commerce Avenue Tennessee Valley Authority.
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Knoxville, Tennessee '37902 Robert F. Sullivan U. S.. Nuclear Regulatory Commi_ssion.
Route 2, Box 311 Athens, Alabama 35611 Athens Public Library South and Forrest Athens, Alabama 35611 Mr. John F.-Cox.
Tennessee Valley Authority W9-D 207C 400 Commerce Avenue l
Knoxville, Tennessee 37902
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Mr. Herbert Abercrombie
. Tennessee Valley Authority P. 0.. Box 2000 Decatur, Alabama 35602 l
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RPS POWER SUPPLY DESIGN MODIFICATION REQUEST FOR ADDITIONAL INFORMATION BROWNS FERRY PLANTS, UNITS 1, 2, AND 3
' DOCKET NOS. 50-259, 50-260, 50-296 1.
Submit detailed drawings of the proposed design modification to the monitoring system for the RPS power supplies (MGs and alternate source).
The drawings.should include component ratings, and schematic and wiring diagrams.
Detailed relay information may be submitted in the form of the manufactur ers Technical Bulletin.
. 2.
Submit a current revision,of the electrical one-line diagram of the on-site distribution system.and a schematic / elementary diagram that includes the RPS power distribution buses.
3.~ Provide justification that proposed time delays, if any, will not result in damage to RPS system components or affect the performance of required safety functions.
4.
Provide justification that the design modification and components will meet the requirements of GDC 2 and GDC 21 of 10 CFR Part 50, Appendix A.
5.
Spec.ify monitoring. system over-voltage, under-voltage, and under-frequency trip setpoints.
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ELECTRICAL POWER SYSTEMS 3/4.8.2 ONSITE POWER DISTRIBUTION SYSTEMS ELECTRIC POWER MONITORING FOR REACTOR PROTECTION SYSTEM LIMITING CONDITION FOR OPERATION
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3.8.2.7 The power monitoring systeg for the in service RPS MG set or Alternate Source shall be OPERABLE.
APPLICABILITY:
CONDITIONS 1 and 2.
ACTION:
EWith the power monitoring.sys' tem for the in service RPS MG set or Alternate Source inoperable, restore the inoperable power monitoring system to OPERABLE status within 30 minutes or remove the RPS MG set or Alternate Source associated with the inoperable powe'r monitoring system from service.
One channel of a power monitoring system may be inoperable, as necessary for test or maintenance, not: to exceed 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> / month.
SURVEILLANCE REQUIREMENTS C
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4.8.2.7 The above specified RPS power monitoring system instrum'entation shall be determined OPERABLE:
a.
At least once'per six months by performing a CHANNEL FUNCTIOSAL TEST; and b.
At-least once per operating cycle by demonstrating the OPERABILITY of over-voltage, under-voltage and urider-frequency protective instrumentation by performance of a CHANNEL CALIBRATION including simulated automatic actuation of the protective relays, tripping logic and output circuit breakers and verifying the following setpoints.
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Over-voltage <
- VAC, 2.
Under-voltage >_
VAC, and 3.
Under-frequency >_'
Hz.
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