ML20080L636
| ML20080L636 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/31/1994 |
| From: | Shell R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9503020265 | |
| Download: ML20080L636 (12) | |
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Bl4 Tennenee VaftetAuthority Post Offce Bos 2000 Soddy Daisy Tennessee 37379 February 22,1995 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 (SON) - 1994 ANNUAL REPORTS Enclosed are the 1994 Annual Repor'ts for SON. These reports contain a summary of the following items: occupational exposure data, reactor coolant system specific activity analysis, and diesel Generator reliability data.
This report is being submitted to satisfy the requirements of Technical Specifications 6.9.1.4, 6.9.1.5, and 6.9.2.2.
Please direct questions concerning this submittal to Keith Weller at (615) 843-7527.
Sincerely
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R. H. Shell Manager Site Licensing Manager Enclosure cc: See page 2 1
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9503020265 941231 PDR ADOCK 05000327 [ i
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-_U.S. Nuclear Regulatory Commission
>- _Page 2 February. 22,1995 i
-I cc (Enclosure).
iJ ' Mr. D. E. LaBarge, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike j Rockville, Maryland 20852-2739 l
NRC Resident inspector l Sequoyah Nuclear Plant l 2600 Igou Ferry Road j Soddy-Daisy, Tennessee 37379-3624 j 1
Regional Administrator- i U.S. Nuclear Regulatory Commissa,c !
Region ll 101 Marietta Street, NW, Suite 2900 ;
Atlanta, Georgia 30323-2711 ;
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s TENNESSEE VALLEY AUTHORITY i a
SEQUOYAH NUCLEAR PLANT ,
UNITS 1 AND 2 -
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l ANNUAL REPORTS TO THE - .;
NUCLEAR REGULATORY COMMISSION i
JANUARY 1 - DECEMBER 31,1994 DOCKET NUMBERS 50-327 AND 50-328 :
LICENSE NUMBERS DPR-77 AND DPR-79 ;
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.SEQUOYAH NUCLEAR PLANT ANNUAL REPORTS 1994 i
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TABLE OF CONTENTS i i
Page l-Preface . . . . ..........................1 Occupational Exposure Data ................2 i i
Diesel Generator Reliability Data ............6 {
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SEQUOYAH NUCLEAR PLANT (SON) .
ANNUAL REPORTS ;
1994 5
- The following are descriptions of the items contained in this report.
Occuoational Exoosure Data l Enclosed is the exposure data for personnel at SON that received greater than 100 millirem between January 1 and December 31,1994. Exposure data for !
special maintenance is based on the following activities:
Spent Fuel Pool Rerack Relocation of the Unit 1 Reactor Coolant Drain Tank Level Transmitter Modification of the Unit 1 Reactor Coolant Pump Oil Drain System Splicing of Cables in Unit 1 Penetrations 34, 28,18, 50, and 33 Modification of Hangers, Supports, and Clamps Valve Maintenance in the Unit 1 Excess Letdown Heat Exchanger Room i Cleaning / Measuring of Unit 1 Reactor Coolant Pump No.1 Flange Bolt Holes ;
Replacement of the Unit 2 Control Rod Drive Mechanism Cooler Coils ,
Change out of the Unit 2 Reactor Coolant Drain Tank Level Transmitter Relocation of the Unit 2 Reactor Coolant System Temperature Modifier Change out of the Unit 2 Lower Compartment Cooler Coils Repair of the Unit 2 Containment Floor Coatings Gamma Scan Analysis for Unit 2 Reactor Coolant System Soecific Activity Analysis (Specific lodine Isotopic Activity Concentration and/or del-131 Determination)
During 1994, there were no specific iodine activity results of Unit 1 or Unit 2 ,
reactor coolant systems exceeding the limits of Technical Specification (TS) 3.4.8.a (1.0 Cl/gm) during either power operation or reactor shutdown
- and/or start-up.
Diesel Generator (D/G) Reliability Data i The reliability data for the SON 6900-volt emergency D/Gs is enclosed in j
- accordance with TS 6.9.2.2. ,
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~ REIPR219 TENNESSEE YALLEY AUTEORITY RCN DATE: 01-11-95 SONRADIATIONEIPCSURESYSTEM TG TIME: 16:25:39 NUMBER OF PERSONEL AND MAN-REM ET OH JOB PUNCTION TOTAL NWBER OF INDIVIDCALS EMBER OF PERSONEL (> 100 M-REM) T01kLMAN-REM M0 4EACTOR OPS SURVEILLANCE GIOUP STATION UTILITY CONTRACT TOTAL STATION UTILITY CONTRACT TOTAL EMPLOYEES EMPLOYEES AND OTEERS PERSONS EMPLOYEES EMPLOYEES AND OTEERS M-REMS MAINTENANCE PERSONEL 64 2 98 164 1.331 0.007 3.330 4.668 OPERATIN3 PERSONNEL 37 6 1 44 3.978 0.996 0.025 4.999 EEALTH PEYSICS PERSONNEL 43 7 43 93 3.889 0.454 2.337 6.680 SUPERVISORY PERSONNEL 23 2 0 25 0.610 0.002 0.000 0.612 EN3INEERIN3 PERSONNEL 24 8 6 38 0.871 0.033 0.713 1.623 MO 191 25 148 364 10.685 1.492 6.405 18.582 ,
MO ROUTIE MAINTENANCE GROUP STATION UTILITY CONTRACT TOTAL STATION UTILITY CONTRACT TOTAL EMPLOYEES EMPLOYEES AND OTEERS PERSONS EMPLOTEES EMPLOTEES AND OTEERS M-RENS MAINTENANCE PERSONNEL 120 7 402 529 26.104 1.903 76.424 104.431 !
OPERATIN3 PERSONNEL 48 8 13 69 3.453 0.766 2.311 6.530 EEALTH PHYSICS PERSONNEL 63 7 59 131 8.735 0.754 14.628 24.117 SUPERVI! DRY PERSONNEL 30 3 0 33 1.802 0.044 0.000 1.846 l' ENGINEERIN3 PERSONNEL 34 19 41 94 2.006 0.251 1.182 3.439 MD 297 44 515 856 42.100 3.118 94.545 140.363 N0*IN-SERVICEINSPECTION OROUP STATION UTILITY CONTRACT TOTAL STATION CTILITY CONTRACT TOTAL EMPLOYEES EMPLOYEES AND OTEERS PERSONS EMPLOYEES EMPLOYEES AND OTEERS M-REMS MAINTENANCE PERSONEL 21 0 93 114 2.194 0.000 9.894 12.088 OPERATIN3 PERSONNEL 4 1 19 24 0.058 0.026 3.708 3.792 EEALTH PHYSICS PERSONEL 32 5 35 72 0.994 0.411 5.557 6.962 SUPERVISORT PERSONEL 8 1 0 9 0.159 0.043 0.000 0.202 EN31NEERIN3 PERSONNEL 8 24 71 103 0.967 6.518 39.338 46.823 l 1
I MD 73 31 218 322 4.372 6.998 58.497 69.867 MD SPECIAL MAINTENANCE GROUP STATION ETILITY CONTRACT TOTAL STATION CTILITY CONTRACT TOTAL EMPLOYEES EMPLOYEES AND OTEERS PERSONS EMPLOYEES EMPLOYEES AND CIEERS M-RENS MAINTENANCE PERSONNEL 51 3 270 324 4.748 .009 34.498 39.255 Page 2
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" REIPR219 ' TENNESSEE YALLEi AUTEORITY Etli DATE: 01-11-95 SQN RADIATION BIPOSCE SYSTEM N 1 RUNTIME: 16:25:39 i NUMBER OP PERSONNEL AND MAN-EM BY V0H JOB PUNCTION TOTAL NLE ER OF INDIVIDUALS NLEER OF PERSONNEL (> 100 M-REM) TOTAL MAN-REN
. OlERATIN3 PERSONNEL '21 2 5 28 0.147 0.028 0.332 0.501
- EEALTH PEYSICS PERSONNEL 29 3 25 57 0.699 0.011 0.369 1.079 GUPERVISORY PERSCNNEL 12 0' O 12 0.113 0.000 0.000 0.113 ENGINEERIN3 PERSONNEL 6 2 7 15 0.089 0.020 0.299 0.408- ,
MO 119 10 307 436 5.796 0.068 35.498 41 362 N04ASTE PROCESING OliOUP STATION UTILITY CCNTiiACT TOTAL STATION LTILITY CONTRACT TOTAL.
EMPLOTEES EMPLOYEES AND OTEERS PERSONS EMPLOYEE 3 EMPLOYEES ANDOTHERS M-RENS MAINTENANCE PERSONEL 13 0 22 35 0.231 0.000 0.466 0.703 .
OPERATIN3 PERSONNEL 2 0 1 3' O.149 0.000 0.893 1.042 HEALTil PHYSICS PERSONNEL 23 0 13 36 2.276 0.000 1.098 3.374 SUPERVISORY IERSONEL 2 0 0 2 0.038 0.000 0.000 0.038 ENGIEERING PERSONNEL 2 0 1 3 0.326 0.000 1.385 1.711 MD 42 - 0 37 19 3.026 0.000 3.842 6.868 ;
M0=REPUEL OROUP STATION UTILITY CONTRACT TOTAL STATION LTILITY ~ CONTRACT TOTAL ,
EMPLOYEES EMPLOYEES AND OTEERS PERSONS EMPLOTEES EMPLOTEES AND OTEERS M-EMS [
MAINTENANCE PERSONEL 33 3 75 Ill 3.803 0.060 12.932 16.795 OPERATIN3 PERSONEL 21 3 8 32 1.035 1.044 0.156 2.235 P2ALTHPHYSICSPERSONNEL 21 4 16 41 0.917 0.429 0.170 1.516 L SUPERVISORY PERSONEL 6 1 1 8 0.630 0.326 0.002 0.958' i ENGINEERIN3 PERSONEL 12 5 28 45 0.106 0.509 10.104 10.719 MD 93 16 128 231 6.491 2.368 23.364 32.223 815 126 1353 2294 72.470 14.644 222.151 309.265 P
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EIPR219 TENNESSEE YALLE7 AUTEORIT7 RUNDATE: 01 95 SQN RADIATION EIPOSLT6 SYSTEM BOITIME: 16:25:39 NWBER CP PERSONNEL AND MAN-EM BY WORI JOB PUNCTION TOTAL N W BER OP INDIVIDUALS NUMBER OP PERSONNEL (> 100 M-REM) TOTAL MAN-REM GROUP STATION UTILITY CONTRACT TOTAL STATION UTILITY CONTRACT TOTAL EMPLOTEES EMPLOYEES AND OTEERS PERSONS EMPLOYEES EMPLOYEES AND OTEERS M-REMS l
MAINTENAN08 IERSONNEL 302 15 960 1277 38.417 1.979 137.544 177.940 OPERATING PERSONNEL 133 20 47 200 8.820 2.860 7.425 19.105 L EEALTH PHYSICS PERSONNEL 213 26 191 430 17.510 2.059 24.159 43.128 i SUPERVISORT PERSONIEL 81 7 1 89 3.352 0.415 0.002 3.769 l
ENGINEERIN3 PERSONNEL 86 58 154 298 4.371 7.331 53.021 64.723 14.644 222.151 309.265
( 815 1.'6 1353 2294 72.470 1
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1 REIFR219 .
TENNESSEE VALLEY AUTH0RITY l RUM DATE: 01-11-95' ' SQN RADIATION EIPOSURE SYSTEM RLW TIXE: 16:25:39 ~
NUMBER OP PERSONNEL AND MAN-REM BY WORK JOB FUNCTION ;
TOTAL NUMBER OF INDIVIDUALS GROUP STATION UTILITY CONTRACT TOTAL i MAINTENANCE PERSONNEL 111 6 403 520 OPERATING PERSONNEL 37 7 24 68 EEALTH PHYSICS PERSONNEL 37 9 60 106 SUPERVISORY PERSONNEL 32 1 1 34 ENGINEERING PERSONNEL 29 19 92 140 246 42 580 868 I
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9 SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 DIESEL GENERATOR (D/G) RELIABILITY DATA REPORT FOR 1994 This report is submitted to comply with Technical Specification (TS) 6.9.2.2 for an annual data report for D/G reliability. The 6.9 kilovolt D/Gs at SON serve as the onsite Class 1E power source. Surveillance requirements of the TSs that demonstrate operability of the DGs are accomplished by the routine performance of the following surveillance instructions (SI)-
1-SI-OPS-082-007.A, " Electrical Power System - D/G 1 A-A" 1-SI-OPS-082-007.B, " Electrical Power System - D/G 1B-B" 2-SI-OPS-082-007. A, " Electrical Power System - D/G 2A-A" 2-SI-OPS 082-007.B, " Electrical Power System - D/G 2B-B" 0-SI-OPS-082-007.0, " Diesel Generator Operability Verification" 1-SI-OPS-082-026.A, " Loss of Offsite Power with Safety injection-D/G 1 A-A Containment Isolation Test" 2-SI-OPS-082-026.A, " Loss of Offsite Power with Safety injection-D/G 2A-A Containment Isolation Test" 1-St-OPS-082-026.8, " Loss of Offsite Power with Safety injection-D/G 18-B Containment isolation Test" 2-SI-OPS-082-026.B, " Loss of Offsite Power with Safety injection-D/G 2B-B Containment isolation Test" SI-102 series documents the performance of vendor recommended maintenance.
The information listed below is a tabulation of D/G testing data taken from 0-SI-OPS-082-007.M, " Diesel Generator Surveillance Frequency." The data was taken from testing performed during the period of January 1 through December 31,1994. " Valid Test" and " Invalid Test" are defined in accordance with the criteria established in Regulatory Guide 1.108, Revision 1, August 1977.
VALID TESTS INVALID INVALID D/G D/G STARTS VALID TESTS FAILURES TESTS FAILURES 1 A-A 40 15 0 25 1 18-B 39 15 0 24 0 2A-A 60 20 2 40 1 28-B 51 14 0 37 0 TOTALS 190 64 2 126 2
o Both valid failures occurred 'on D/G 2A-A and are discussed below:
The first valid failure resulted from D/G 2A-A only achieving and maintaining a frequency of 59.98 Hertz during a monthly surveillance test. This fails to meet I the SON TSs surveillance requirements. The D/G was fully capable of meeting l its design function and no malfunction had occurred. The possibility of this ;
occurring was identified in reviewing the postmaintenance test results of the D/G 2A-A' electric governor upgrade and a TS change, TS 94-16, was in !
process. ' Approval of the TS change will allow removing this event as a valid failure.
The second valid failure resulted from D/G 2A-A's speed being erratic. The D/G did not achieve the minimum required frequency and was emergency stopped within minutes of the diesel start. The problem was identified to be a loose connection of the speed reference resistors on the electric governor controller :
card.
There were two invalid failures that occurred in 1994 and are described below:
At the operator's discretion, the D/G 2A-A valid test was stopped prior to reaching fullload because of a fuel oilleak at the duplex oil filters. The fuel oil )
leak would not have prevented the D/G from performing its design function. .
The filters can be isolated and replaced with the diesel in operation.
The dig 1 A-A valid test was stopped because of the inability to reset the b emergency start signal from the onder voltage relay. The D/G could not be )
parallelled and loaded due to the standing emergency start signai. The relay malfunction was inadvertently caused during the manual actuation of the relay for the surveillance. The relay was recalibrated and SI-7 was performed before returning the D/G to service.
The above data indicates an average of 47.50 starts per D/G for the year with only two failures. Two failures out of 190 valid and invalid tests support a reasonable confidence level that the D/Gs will perform when required. _
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SON recognizes the importance of reducing the number of D/G starts. As shown below, for the operating years 1988 through 1992, a downward trend for D/G starts was established. Due to air start modifications installed during 1993, six-year required maintenance activities, and accelerated testing for the 2A-A D/G, additional starts per D/G set were accumulated during calendar year 1993. However, as revealed by the data below, the number of D/G starts has again been reduced, but were not as low as 1992 due to the speed controller modification and accelerated testing on D/G 2A-A.
APPROXIMATE NUMBER OF TOTAL D/G STARTS PER YEAR 1988: approximately 170 starts per D/G per year 1989: approximately 55 starts per D/G per year 1990: approximately 36 starts per D/G per year 1991: approximately 36 starts per D/G per year 1992: approximately 35 starts per D/G per year 1993: approximately 69 starts per D/G per year 1994: approximately 47 starts per D/G per year SON will continue efforts to keep D/G starts as low as possible to enhance engine life and D/G reliability.
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