ML20236E675
| ML20236E675 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/22/1987 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20236E191 | List: |
| References | |
| 237.6(B), 237.6(B)-R, 237.6(B)-R00, NUDOCS 8710290309 | |
| Download: ML20236E675 (29) | |
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'TVA EMPLOYEE CONCERNS
. REPORT. NUMBER:
237.'6( B)
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SPECIAL PROGRAM' oREPORT TYPE:
.SEQUOYAH ELEMENT REVISION' NUMBER: -0.
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sTITLE; ELECTRICAL PROTECTION DESIGN ~
' Gassing.of Current Transformers.
PAGE'1 0F-12:
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REASON FOR REVISION:-
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a PREPARATION PREPARED BY:
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SIGNATURE DATE REVIEWS REVIEW COMMITTEE AsC#dA0bx b&
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0710290309 071023 PDR ADOCK 05000327 CEG-H:h.4% Rnd A/ 72 W P
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SIGNATURE DATE SIGNATURE DATE 1
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APPROVED BY:
ECSP MANAGER DATE MANAGER OF NUCLEAR POWER DATE CONCURRENCE (FINAL REPORT ONLY)
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TVA EMPLOYEE CONCERNS REPORT NUMBER:
237.6(B)
SPECIAL PROGRAM REVISION NUMBER:
0 PAGE 2 0F 12 i
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1.
CHARACTERIZATION OF ISSUES:
Concern:
Issues:
WI-85-060-N02 a.
Current transformers (CT) are "fVA's problem with gasing
" gassing" (generating explosive of current transformers has gasses within).
led to outages of line and bus j
ties to obtain oil samples and b.
Outages are required to obtain oil determine gasing condition."
samples to monitor gassing conditions.
c.
If gas content of oil exceeds recommended levels, the CT must remain out of service.
d.
Outages of cts may lead to switch-yard configuration changes.
e.
Changes in switchyard configuration may reduce plant security (safety).
NOTE:
Issues "c,"
"d," and "e" stated here were developed from an evaluation team review of the expurgated interview file for this concern.
2.
SAVEISSUESBEENIDENTIFIEDINANOTHERSYSTEMATICANALYSIS? YES X NO Identified by TVA Report to the Southeast Region NERC Operating Committee Meeting Date 10/16/85 Documentation Identifiers:
TVA Report "TVA's Experience & Action Plans With Freestanding Oil-filled Current Transformers," by John R. Boyle, Tennessee Valley Authority, Chattanooga, Tennessee. Presented to Southeast Region NERC, Operating Committee Meeting, October 16, 1985, Chattanooga, Tennessee.
3.
DOCUMENT NOS., TAG N05., LOCATIONS OR OTHER SPECIFIC DESCRIPTIVE IDENTIFICATIONS STATED IN ELEMENT:
The concern applies to all 161 kV and 500 kV freestanding oil-filled current transformers.
05470 April 21, 1987
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g TVA EMPLOYEE CONCERNS REPORT NUMBER:
237.6(B) j SPECIAL PROGRAM
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REVISION NUMBER:
0 l
PAGE~3 0F 12
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'4. -
INTERVIEW FILES REVIEWED:
Expurgated file WI-85-060 was reviewed and additional information was obtained and incorporated into the issues above.
The file contained the additional statements-r "TVA's problem with gassing of free standing cts has led to more outage of line and bus tie PCBs to obtain CT oil samples and determine gassing conditions.... If gassing exceeds recommended levels, then the PCBs must remain out of service.
Thus, the potential for 500-kV switchyard configuration. changes exists which can reduce plant security."
5.
DOCUMENTS REVIEWED RELATED TO THE ELEMENT:
See Appendix'A.
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WHAT REGULATIONS, LICENSING COMMITMENTS, DESIGN REQUIREMENTS OR OTHER APPLY OR CONTROL IN THIS AREA?
l See Appendix A.
7.
LIST REQUESTS FOR INFORMATION, MEETINGS, TELEPHONE CALLS, AND OTHER DISCUSSIONS RELATED TO ELEMENT.
See Appendix A.
8.
EVALUATION PROCESS:
a.
Reviewed TVA program for monitoring of CT gases.
j b.
Established effects of failure.
c.
Checked industry sources for similar occurrences, d.
Reviewed TVA safety procedures and plans to evaluate the need for CT condition monitoring.
e.
Explored industrial response to problem.
f.
Compared TVA's approach / solution with actions taken by the industry.
1 05470 April 21,1987
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e TVA EMPLOYEE CONCERNS REPORT NUMBER:
237.6(B)
'SPECIAL PROGRAM REVISION NUMBER:
0 PAGE 4 0F 12 9.1 DISCUSSION, FINDINGS, AND CONCLUSIONS:
1 CHRONOLOGY-j 1965:
TVA begins purchasing freestanding, oil-filled current
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transformers (cts).
1969:
First recorded 500 kV failure occurs (Cordova)
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1977:
Destructive failure of two 1.61 kV cts (one at SQN and one at Cordova) i 1978:
Four 161 kV CT destructive failures occur (Raccoon Mountain)
TVAandmanufacturerbelievefailuresdue[toinsulation 1978:
damage; cts modified and returned to service 1983:
Three of the rebuilt cts fail (Raccoon Mountain)
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12/28/84: TVA issues report on system monitoring at Raccoon
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Mountain - concluding failures are not system related 07/29/85:
TVA issues hazard control instruction for SQN switchyard operations 1985:
Doble conducts industry survey; finds that other utilities have had failures 1985 to TVA sets up safety, testing, and replacement programs present:
Discussion:
The concern has been determined to be a nonrestart item for Sequoyah because the current transformers in question are not used in class 1E systems (medium and low voltage) but have high voltage applications only. This limits their use to the switchyards of generating facilities (i.e., nuclear plants).
An investigation is warranted, however, because the issues developed from this concern have a potential impact on the two independent preferred power sources required for nuclear power plants by I
General Design Criterion (GDC) 17 (App. A, 6.b).
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REPORT NUMBER:
237.6(B)
TVA EMPLOYEE CONCERNS SPECIAL PROGRAM REVISION NUMBER: 0 PAGE 5 0F 12
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The phenomenon of high voltage (HV) transformers " gassing" (creating explosive gasses within) has been known for some time. The problem was previously thought to be limited to power transformers; however, it'has
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recently-(within the last 10 years) shown'up in HV current transformers (cts).
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The history of TVA's use of oil-filled, freestanding cts goes back to 1965. With the advent of airblast breaker application, TVA began purchasing these cts.
The first failures (one 500 kV CT at Cordova in 1969, one 161 kV CT at Sequoyah in 1977, and one 161 kV CT at Cordova in 1977) were considered to be random events.
However, the destructive i
failure of four 161 kV cts at Raccoon Nojntain raised the probability of a generic problem. The'CT failures were associated with gassing (generation of explosive gases) within the CT and were believed to be I
caused by high frequency (HF) transients generated by the arcing of isolating disconnect switches.
Subsequent failures of oil-filled cts at TVA involved types by several manufacturers. A summary of failures (tabulated in Figure 2 of App. A, 5.a) indicated that, in addition to the catastrophic failure of six 500 kV cts and eleven 161 kV cts, five 500 kV l
cts and sixteen 161 kV cts were removed from service because of gassing.
Out of the 689 cts installed at TVA, 21 were removed for failure and 28
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for gassing, and 20 were placed under observat;on.
A survey conducted by i
Doble on high-voltage instrument transformers (App. A, 5.f) reported that TVA was not alone in the failure of oil-filled, freestanding cts.
I Responding to a questionnaire,13 utilities reported 34 violent CT failures.
Although the gassing and subsequent catastrophic destructive failure of cts is an industry-wide problem, as documented in the Doble report and l
Electric Utility Weekly (App. A, 5.f and 5 9), TVA appears to have a disproportionately high number of such occurrences. As a result, TVA has lead the industry in efforts to determine the cause(s) of the gassing.
l These efforts consist of three programs:
o TVA conducted system monitoring at Raccoon Mountain substation to determine whether system transients, such as those induced by i
switching and lightning strikes, were causing the CT gassing. After
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several months, there was no conclusive evidence to support this theory, and the investigation was discontinued (App. A, 5.i; 12/28/84).
o TVA contracted with an outside vendor to perform a diagnostic i
program to investigate the theory that the insulation was breaking down, thereby causing the gassing. This breakdown and subsequent gassing have been observed in large HV power transformers. Two cts are to be subjected to voltage impulse tests, partici discharge tests, and subsequent dismantling.
i 0547D April 21, 1987
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1 TVA EMPLOYEE CONCERNS.
REPORT NUMBER:
237.6(B)"
- SPECIAL PROGRAM J
REVISION NUMBER: 0 j
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PAGE 6 0F 12 f:
.~o Concurrently with the above programs, TVA Power Systems Operation
.(PS0) is developing a monitoring system to warn when a CT is gassing. A power factor monitor is'the most likely't' pe to be used y
(App. A, 7.b) because~its response time to gassing (indicated by a marked increase in power factor) is much less than that of a conventional oil. gas (hydrogen) content monitor.
'In'the interim, TVA has established programs and proceoures'to protect personnel and to detect gassing cts by sampling.
For SQN, Hazard i
Control Instruction (HCI) E-9, " Safety Precautions for Operations in Switch. Yards" (App. A, 5.k; 07/29/85), has been revised to incorporate the use of potential danger zones around cts and oil sampling-requirements. These procedures are intended to keep personnel'a safe distance from suspect cts and to detect gassing cts before. catastrophe failure.
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. From the previous studies ( App. A, 5.a) and the analysis of past failures (App. A,;5.u), TVA has defined a CT to be " hazardous" when the gas 1
content of the oil exceeds 200 ppm hydrogen.
For these hazardous cts, the potential danger zone is considered to be 100. feet and 300 feet for 161 kV and 500 kV, respectively. These distances are based on known 1
missile travel from previous failures. There is strong evidence (App.'A, 5.u) that the majority of the resulting damage to equipment due' 3
to a catastrophic f ailure is not from projectiles, but rather the resulting fire;(the insulating oil is flammable).
The preferred power sources used to t.atisfy the requirements of GDC 17 (App. ' A, 6.b) are supplied from the 161 kV switchyard. This switchyard is connected to the 161 kV distribution system via several transmission lines and to the 500 kV system via a bus intertie (App. A, 5.d and 6 a).
This multiplicity of switchyard sources separated by hundreds of feet i
provides assurance that a failure of a CT associated with these transmission lines will not deenergize the entire 161 kV switchyard.
Furthermore, the switchyard bays providing preferred power to the plant, from different bus sections, are sufficiently separated and a catastrophic failure of an associated source CT will not affect the
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alternate supply. A review of past failures (App. A, 5.u) indicates that j
damage to the switchyard is limited to adjacent bays and that bus section l
separation prevents total switchyard deenergization.
l Findings:
a.
TVA and other utilities are experiencing gassing of their high voltage cts.
i 05470 April 21, 1987
.. o-y TVA EMPLOYEE CONCERNS
' REPORT NUMBER::?237.6(B)
- SPECIAL PROGRAM'
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-REVISION NUMBER: 0 Y
PAGE 7 0F 12 N
f b.-
Power' circuit, breakers (PCBs) must be, tripped to de-energize cts so-that oil samples can be taken:for analysis.of gas (usually_ hydrogen) content of the insulating oil..
c.- 'When the. gas content of the'CT insulating oil is above the recommended maximum (i.e., 200 ppm hydrogen), then:that _ CT-must remain out of service.until it is degassed or-replaced. This also means the PCB will remain out'of service.
d.
Switchyard configuration changes are made, as. necessary, to.
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acconnodate _ oil sampling and, if need be, out-of-service equipment.
1 e.
The issue.that switchyard. configuration changes (due to outages or
' failures) could' jeopardize the safety of the plant has not been substantiated for the following reasons:
o None 'of.the suspect high voltage cts are part of the class lE safety-related power _ system.
o The switchyard changes'are a planned and coordinated activity,
-and sufficient' equipment exists so that multiple sources are
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available'to the plant.
'o The two independent preferred power sources required'by 10 CFR 50 Appe'ndix A, General. Design Criterion 17 are physically separated in their routing. They terminate in the SQN 161 kV switchyard in bays, which are more than 300 feet apart; therefore, failure of a single CT will not affect the alternateLpreferred source, f.
Furthermore, during its investigation, the evaluation team established that TVA has taken steps to determine the cause of the
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gassing /f ailures of the cts, has. implemented procedures to protect 1
personnel, and is establishing programs to prevent catastrophic
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failures. Specifically,'TVA has taken, or is in the process of j
taking, the following actions:
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o SQN Hazard Control Instruction HCI-E9, " Safety Precautions for Operations in Switchyards," has been implemented. This instruction establishes minimum safety precautions to be taken j.
when working in switchyards and oil sampling requirements, o
TVA performed system studies and monitoring at Raccoon Mountain, where most of the failures have taken place.
The results were inconclusive, and these efforts were abandoned.
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..237.6(B).
L TVA EMPLOYEE CONCERNS REPORT NUMBER:
h SPECIAL PROGRAM i
REVISION NUMBER: 0 j
PAGE 8 0F 12 i
o TVA PS0 is in the process of developing an on-line monitoring system to detect excessive gassing of cts in time to remove them from service prior to failure. Monitor testing is currently being conducted at Raccoon Mountain.
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In cooperation with an outside vendor TVA has contracted for:
A diagnostic test program where cts will be subject to partial discharge (corona) tests and impulse voltage tests A subsequent dismantling and inspection program
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Conclusions:==
The concern is valid in that TVA and the rest of the power industry do l
have a problem with the gassing of oil insulated HV cts; however, the i;
assertion that plant safety is jeopardized has not been substantiated.
This type of CT is not used in safety-related systems at SQN and the i
requirements and intent of GDC 17 have been met. As part of a long-range program, TVA is working with manufacturers and cooperating with other Ij
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utilities to resolve this problem. Furthermore, TVA has developed programs for personnel safety, testing, monitoring, and replacement to
,i adequately satisfy the immediate issues associated with the CT " gassing" i'
problem as expressed in the concern.
- 10. CORRECTIVE ACTION:
TVA has previously submitted a corrective action plan (CAP) that addresses the' findings of this report. The CAP was transmitted via TCAB-316 on 03/16/87 in response to corrective action tracking document (CATD) 237 06 NPS 02, which was issued as part of WBN Element Report 237.6.
The CATD had the following problem description:
"The CT monitoring program has not been fully implemented nor has the diagnostic testing and subsequent dismantling of a CT been completed." This CATD is non-plant specific (NPS); it applies to all TVA plants including SQN. The CAP commits to the completion of the previously established programs, as identified in the CATD. No completion date is forecasted or necessary as this is a continuing effort. Furthermore, the described problems are nonquality-related (NQR) and are therefore not required to be completed prior to fuel load or restart.
The evaluation team considers these actions appropriate and sufficient to resolve the identified problems.
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05470 April 21, 1987 l
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9-TVA EMPLOYEE CONCERNS.
REPORT NUMBER: 237.6(B) d SPECIAL PROGRAM e
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' REVISION NUMBER:- 0
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PAGE 9 0F 12-
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APPENDIX A
- c DOCUMENTSREVIEWED'RELATkDTOTHEELEMENT:
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Report "TVA Experience and ' Action Plans.~with Free-standing Oil-filled
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Current Transformers," by' John R. Boyle. TVA, presented to the 1
Southeast Region NERC Operating Committee Meeting, Oct.- 16,(1985.in j
' Chattanooga, TN.
j b.
TVA memo from John R. Boyle to those listed, "itinutes of the Current-Transformer (CT) Failure Task Force Meeting on June 10,.1986," (A05 j
'860630 351), (06/27/86) i c.
TVA neno from John R. Boyle to'those in attendance list, " Minutes of the Current Transformer (CT) Failure lask Force Meeting-July.9, 1986," (A05 860718 351), (07/17/86) d.
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Wiring Diagrams I
45N500 R10, Development Single Line
-l 45N504 R8, 161 kV Main Single Line - Sh. 1 i
45N505 R15,161 kV Main Single Line - Sh. 2 1
1 45N506 R13,.161 kV Main Single Line - Sh. 3 45N507 R2,161.kV Main Single Line - Sh. 4 4
45N504 R16, 500 kV Main Single Line - So. 1 45N505 R13, 500 kV Main Single Line - Sh. 2 45N506 R8, 500 kV Main Single Line - Sh. 3 Electrical Equipment Plans 75W200 R16, Switchyard 75N206 R3, 161 kV Switching Structure Bays 8 to 13 75N216 R1, 161 kV Switching Structure - Typical Cross Sections, Sh. 2 e.
American National Standard ANSI /IEEE C57.104-1978, "IEEE Guide for
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the detection and determination of generated gases in oil immersed X
transformers and their relation to the service-ability of the equipment, (06/07/78) 05470 April 21, 1987 1
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.TVA EMPLOYEE CONCERNS REPORT NUMBER:
237.6(B)
SPECIAL PROGRAM REVISION NUMBER: 0 PAGE 10 0F 12 APPENDIX A (Cont'd) f.
Doble, Technical Questionnaire 52AIC85, " Instrument Transformer Troubles and Failures," (1985) g.
Electric Utility Weekly, " Transformer Failure,at Palo Verde Plant Site," pp. 4 and 5, (05/06/85) h.
Hazard control instruction (HCI) E9 " Safety Precautions for Operations in Switchyards," (07/29/85) 1.
TVA memo from R. C. St Clair to Those Listed, " Report on Test Program to Investigate 161 kV CT Failures at Raccoon flountain Pumped Storage Plant,"
(G04 8412 31001)g (12/28/84) j.
TVA memo from Darling to Those Listed, " Freestanding Oil-filled cts," [LOS 850111 801], (01/21/85) k.
TVA meno from Hutton to Those Listed, " Status-Report -
Freestanding 011-filled CT Problems," [R00 850423 099],
(04/11/85)
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TVA memo from Parris to Those Listed, " Freestanding Oil-filled CT Safety Program," [A40 850524 001], (05/30/85)
TVA memo from Wallace to Jones, " Switchyard Oil-filled cts m.
with High Hydrogen Content," [R39 840720 004], (07/20/84)
TVA memo from Green to'Sprouse, "SQN - Spreche & Schun 500 kV n.
cts - Tests Indicating Future Failures," [ DES 821115 016),
(11/12/82)
TVA memo from Sprouse to Green, " Transfer of Two 500 kV cts o.
from Yellow Creek Nuclear Plant to SQN," [EEB 821227 911],
(12/21/82)
TVA memo from Vineyard to Rankin, "SQN - Scope of Work p.
Document for ECN L 6388-NUC PR Review," [B25 850726 009],
(07/26/85)
TVAEngineeringChaneNoticeL6338),"SQN-Installationof q.
Hydrogen lionitors,"
B25 850315 513 (02/27/85)
TVA, Oil-Filled Freestanding Current Transformer Sunmary, r.
(09/02/86)
TVA, Current Transformer Failures - Summary, (09/02/86) s.
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0547D April 21, 1987
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TVA EMPLOYEE CONCERNS-REPORT NUMBER: 237.6(B)
J SPECIAL PROGRAM REVISION NUMBER: 0 C
PAGE 11 0F 12 APPENDIX A (Cont'd) t.
TVA, Current Transformers Removed from Service Because. of
.j Elevated Gas-in-Oil and/or Power Factor - Summary, (09/02/86) 1
.u.
TVA current transformer. failure reports:
84-1501, " Interruption to WBN," (05/07/84) 84-1502, " Interruption to WBN," (04/21/84) 80-1303, " Final Report - Interruption to WBN," (06/16/80) l 85-1511 " Raccoon Mountain - Failure of PCB 844 C Phase CT, (06/29/85) 9 85-1517. " Raccoon Mountain - Failure of PCB 838 C Phase CT,"
(09/04/85)-
Executive Summary, SQN - Failure of Freestanding CT,"
(12/15/84).
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Corrective Action' Plan. Transmitted via TCAB 316, (03/16/87) w.
All docum'ents listed in Section 6 6.
WHAT REGULATIONS, LICENSING C0i91ITMENTS, DESIGN REQUIREMENTS OR OTHER APPLY OR CONTROL IN THIS AREA?
a.
10 CFR 50 Appendix A, General Design Criterion 17, " Electric
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. Power Systems" j
c.
NRC Regulatory Guide 1.93, " Availability of Electric Power l
Sources," (12/74) j d.
TVA Electrical Design Standard DS-ES.3.1, " Selection of I
1 Outdoor-Type Current Transformers, R1, (01/31/83)
-7.
LIST REQUESTS FOR INFORMATION, MEETINGS, TELEPHONE CALLS, AND OTHE_R_
DISCUSSIONS RELATED TO ELEMENT.
a.
Teleconference between T. Sarver, Bechtel, and J. Boyle, TVA, 10ii 420, (11/21/86) p l:
b.
iteeting in Chattanooga between.B. Arp, J. Boyle, TVA, and I
T. Sarver, Bechtel,.BLT-123, (01/29/87) l f
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c.
Bechtel memo from S. Maybie to T. Sarver, " Review of
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Expurgated File WI-85-060," IOM 840, (02/21/87) 4 05470 April 21, 1987
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' LTVA EMPLOYEE' CONCERNS
REPORT-NUMBER: 237.6(B)-.
SPECIAL PROGRAM REVISION NUMBER: O 4
PAGE 12 0F 12 1
-CATD LIST The'following CATD identifies and provides corrective action for the f.indings included.in this report:-
237.06.NPS 02 (Finding "f")-
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l 0547D April 21, 1987 l
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y;tnti STATES GOVERNNENT i
TENNESSEE VALLEY AUTHORITY j
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LMemovan d.
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James L'. McAnally, Corrective Action Program Manager, ONP, TO Watts Bar Nuclear Plant f
W. R. Brown, Jr.,, Program Manager, Employee Concerns Tast Group, FROM Watts Bar Nuclear Plant ONP DATE V
ppg 3 31987 WATTS BAR NUCLEAR PLANT (WBN) - EMPLOYEE CONCERNS TASK GR
SUBJECT:
ION
.(ECTG) - ENGINEERING CATEGORY - CONCURRENCE WITH CORR PLAN (CAP)
The category evaluation group leader, Engineering, concurs with the attached CAPS presented for the following fact sheets.
20101 21509 22106
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22903 20105
'21511 22201 22909 20106 21801 22203 22911 20404 21803 22204 23002 20406 21804 22206 23005 20601 21806 22207 23104 20703 21807 22301 23105 20801 21809 22302 23106 20901.
21811 22403 23219 21201' 22001 22600 23508 21202 22003 22800 23706 21506 22105 22901 24102 W.
R.' Brown, Jr.
GRM:EMC Attachments cc (Attachments):
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D'VU Ji-[tTED.cTATEs GOVERNMENT TENNESSEE VALLEY AUTHORITY xMcmorandam s
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V. R. Brown, Jr., Program Manager, Employee Concerns Task. Group,
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Watts Bar Nuclear Plant ONP James L. McAnally, Corrective Action Program Manager, Watts Bar FROM. :
Nuclear Plant,0NP DATE
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VAITS BAR flUCLEAR PLANT (VSN) - TRANSMITTAL OF
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S('t JECT: ACT!0d TRACKING DOCLIMENT(S) l i
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l INITIATION C Tes 5 No I=ediate Corrective Action Required:
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ATTACHMENT A 237.06 WBN-01 CATO NO.
PROPOSED CORRECTIVE ACTION PLAN:
10.
The SF Y"
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6
_ arrive. until April 1987.
ECN-5959 and ECN-5960 are design changes to install
.The current-cts in the WBN switchyard prior 't6 unit 1 fuel load.
SF 6
completion date for these changes is October 30, 1987.
See memorandum from George Toto to Ralph B. Ferguson (T24 870303 989).
h i
li Does the corrective action plan rely on or take credit for currently X
Yes_
No identified or previously completed work?
If yes list parent documents (e.g. NCR, SCR, CAR, Audit, etc.)
f Does the problem described constitute a condition adverse to quality (CAj Yes No X
If yes CAQ No._
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milestone (e.g. BfL1, etc.)
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' UNITED STATES GOVERNMENT Memorandum TENNESSEE VALLEY AUTHORITY Ralph B. Ferguson, Director of Power System Operations, LP 2S 125E-C
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George Toto, Site Director, Watts Bar Nuclear Plant ONP FROM
$R 0 31987 nATE 1988 - 1992
SUBJECT:
POWER SYSTEM OPERATIONS' CAPITAL BUDGET - FISCAL YEARS s
Memorandum from you to Those listed 2/23/87 (E32 870219 202)
Reference:
1
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The FI_1987 Capital Budget projected install.ation of the SF6 current transformers to be complete by August 1987. The construction completion date
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was based on a contract performance date of September 1986 for the first
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sixteen SF6 current transformers and a January 1, 1987 date for the second twelve transformers.
It is our understanding that the current projected performance dates are now Construction ecmpletion based on these material 1
April 1987 and June 1987.
delivery dates is estimated for October 30, 1987.
No additional or new transmission system capital projects hcVe been identified j
at this time, i.
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EIMS, ME AN 72A-C E. R. Ennis, Plant Manager, Watts Bar ONPg R. C. Manley, Planning & Scheduling, WattsN ar ONP B
J. A. Thomoson, Modifications, Watts Bar
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UNIT $D STATES GOVERNMENT rtxxtsstt vAttty Aurnonirr Memorandum I
r W. R. Brown, Jr., Program Manager, Employee Concerns Tast Group, j
Watts Bar Nuclear Plant ONP TO.
James L, McAnally, Corrective Action Program Manager, Watts Bar FROM Nuclear. Plant,0NP 3-16 y7 DATE VATTS BAR NUCLEAR PLANT (VBN) - TRANSMITTAL OF
SUBJECT:
ACTION TRACKING DOCUMENT (S)
(CATD) 2 3706-N FS - 02 ECSP Fact Sheet Number:
ECSP CAID(s) Numbers l
The above listed, co:npleted CAID(s) are being returned according to 1
)
your instructions.
- ~
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u JamesL.McAnally/
RECE!VED JLMc:NLC l
Attachments cc (Attachments):
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RIES, MR 42 72A-C Ctr$m C.mn: z Tnb C.e %M 1,Wi%
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.CATG REVIEW FOR TECHNICAL ADEQUACY
.CATD No. _
nWh h (WS.b)f Yb Lead Date
/
3//b!S7 Review Panel Review Panel "ggegd Date r$$.- 3lAlY L'BTF Date ( / Othe.' Date .0ther Date Other Date Other ~ Date ) ~ Other Date Coments: i 1 'j i l s k'BEP-22 Eld 2/5/87 i 1 i
3 EMPLOYEE CONCERN 00RRE0flVE ACTION PIAN ~ This CAP has been' discussed with DNE Lead on / Facilitatory _ [ 3' _. The CAP has also been discussed with Bechtel evaluator J-onh/-0 . s. ~ '~ T 06 *J 05C ') A general agreement on this CAP has been l' reached. l ? e Signature e u m ~ [-C ] ^Q ::, t ~ ~ - 3 370& = = .:t l,- I e 3 u. _.._ l ~ ~ = 3 -- J I 1 i
....i 4 e i EC'"G C.3 Attachment A Page 1 of 1 Revision 2 - A ECSP COEREC IVE Actice Tractine Document l (CATD) l l l INIT!/7 ION _ 1. Imediate Corrective Action Required: O Tes N No 2. Stop Wort Recomenced: O Yes E No 3. CATD No. 987.06 A'#5 CE 4 INITIATION DA~E _ ?.4 37 5. RESPONSIBLE ORGANIZATION: passe .f r3 rg e t opea rov, 6. PROSLIM DESCRIP ION: O QR 5 NQR ve er Moweraeovo noc.m Mns wr eer" smY muueurpo er se rM nae.v _r ree re vice, s un _s w re wr m - n o m/ we er p e r nem OmpwrE5. 1 O ACACHMENTS 7. PREPARED BY: NA=.E _ -r h m 9) 4DV DATE: 3 /.Fe 8. CONCURRENCE: CEG-H lhx R W mutt-C/ DA~E: J.c.. F 7 9. APPROVAL: EC~G PROGFJ.M MGt. OMW ec D1;E: 7 s-W7 H TD
- CORREC IVE ACTION 10.
PROPOEED CORREC IVE.ACC ON PLLH: I I J O ACACHMENTS 11. PROPOSED EY: DIRECTOR /MGR: /A'LN&b DATE: m//o/< 7 12. CONCURRENCE: CEG-H: 4E MS& 41 u H /w DATE: 4-Q'-99 DATE: l SRP: DA~E: EC~G PROGF.1M MGE: VE?ir;;A7:0N AND Cl.0!!Ot** APP.-oved cerrective actices have been verified as satisfactorily 13. ] i:Pl eme r.t e c. Da
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g-...-. o. [L il u s svoa u suo se .d - 9 2 0 g _ z g,,g g,C 0 j s L CATS N< CAPP 1.0-f t. REY. O ATTACHMINT A CATO Ho.}Sh Ab'~ W0~AS g 19'01C3 CCRRren vf ditew *t al ~h (;uelear Power 10. C.. e e '*r a n*h r h interdiviulonal task f orce dealing C 5 -h e i personnel are presently active on and safe operetten. Nuclear power ~ with current transformer frilure ineffective techniques for msfc operation o ~ personnel are implementing cost l and Sk" *'~' ef current transformers at each plout site which ensure ( p[ ^ d The techniquee used'are tailored for eactt. sire an 4 pro-ection. Program established by the. equipmen: .'j. ft compiv vich the Current Transformer Sa e y i ,7 ,gu cD'- interdivisional task f orce.
- wJ.
4 .a % ~ see Attached esi d%,, ~ i .l -)l 2,. i }! for currently Does the correctlye action plan rely on or taks credit Yes W - No_ _ 8'* e .m y icentif tet or previously conrt,1sted werk?If yes list parent d ~l d JNoc h d Es d... / J% f~ I r 3 5 14 to cuality (CAQ)? s -Does the problem d,eycriced constitute a conditlen adverse
- 9..
'5 fro __ X .g Yes_ ~ 3 If yes CAQ No. _ if y ewn, or 1:heduleforcoe.cistioncfccerective.4:gn(seneduledate, I~ milestone (e.g. BF ,etc.) 7% -P 7 M W' O ~ k I :S ' / 2'87 Pfoposecby/Date u 11, - - - ~ ~~ n ~ ~~- - -Proprec cy/0 ate ~ ~ ~ ~ ~ ~ ~ JJ J CWV i i a'A ' eu f dJ,. "l ' $ W A*.p*'. ~ 'us wv i;.1.. ;g._, L t t
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- Problem geckgroundt Failure of ell filled high-volt. age current transformers (cts) on the TVA power system let, to the creation of an interdivi,sional task force to seek imadiate 1.05 050111 601), The task and leng tere, solutions to the problem (reference l
force is currently active in several investigative acces pertaining to The task force operation of cts and detemining root cause of ct. f ailure. f Befety Program (CTSP).(reference . has established a Current Trans omer Aeo 850524 001), exp1cred monitorins ets to detect incipient failure and has examined and tested cts Ln an attempt to discover root cause of failure. The .i ( snost recent task f orce activities were carried out on March 9,1987 through Harch 11, 1987 at s' contractor's faciitty in Alte.o Tennesses. a The Division of.Iluclear Engineering (OtJE), Operations.,and Engineering services (OC2) and Engineering Technical Services (ETS) are active meinbers of the -i-ots perr.onnel assist with interdivisional~cberant transf onner task force, (' l establishing TVA polley as part of their task force duties and direct / assist 'A At 1 ~! the nuclear plant sites with the implementation of the established policy. ? Sequoyah, f or example OES has perfomed a cost study on sampling cts and as a result of the cost study has advised the plant to expedite installation of The analyzer was Hydran 201R gas-in-oil analyzers in the 500-kV switchyard. [ accepted as a detection device af ter Lcsting the 201R at TVA shop f acilities. d 3 y Hydran 201H testing for the,ask force was administered by the Nuclear Power l OES personnel were also involved in the latest activity task force members. d noted above and will continue to participate in task force activities ks Each nuclear plant has a switchyard cognisant engineer who is required. responsible for site implementation of recommendations to safely operate .' j cuerent transf amers. q y t r* .'t l t
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ma.w.:..a, -eMTED STATUS GOVERNNENT i 803. 861128-813 iMemorandum TENNESSEE VALLEY AUTHORITY'- i lh W. R. Brown,-Program Manager, Employee Concerns Task Group, ONP, Watts.Bar To. Nuclear Plant. 'H.-L. Abercrombie, Site Director ONP, O&PS-4, Sequoyah Nuclear Plant. 3 .FROM. i DATE
- - Decegher 3,,19.86 1
SEQUOYAH NUCLEAR PLANT (SQN) - EMPLOYEE CONCERNS TASK GROUP (ECTG
SUBJECT:
ENGINEERING CATEGORY REPORTS - NONRESTART JUSTIFICATION CONCURRENCE Ofrences: 1. Your memorandum ~to me dated October 2, 1986,'" Watts Bar ) Nuclear Plant - Employee Concerns Task Group'- ,,..; R E C E l V E D ' ~ Engineering Category Concerns . Review of Elements'to' 'DfC 5 86 / D* tar =ine if They are Restart It.ms" (T25 861002 868) Employee Concerns Task 2. Your memorandum to me dated October 28,1986, " Watts' Bar Group wen - .__ Nuclear Plant - Employee' Concerns Task Group -
- '.' E.E h
. Engineering Category Concerns Review'of Elements to, Determine if They are Restart Items" (T25 861028 876) gg WLB .., " Watts Bar As 3. Your memorandum to me dated November 6, 1986' Nuclear Plant.- Employee Concerns Task Group'- einS a Engineering Category Concerns - Review of Elements to ^ gj. t i Determine if They are Restart Items" (T25 861106 937) ' +H y a .c
- I9 4.
Your memorandum to me' dated November 20,.1986,." Watts Bar Nuclear Plant - Employee Concerns Task Group - Engineering Category Concerns - Review of Elements to [ i Determine if They are Restart Items" (T25 861120 853) &p Im ir J -In response to your requests (see above references), the following element ids -- -- report nonrestart justifications have been reviewed. I concur that these e reports are not required for restart: 204.1 205.3 235.2 237.6 204.9 235.1 235.4 241.4 204.11 Also, I cannot concur.with the justification for Element Report 229.8 as submitted (see reference 1). This has been coordinated with P. B. Nesbitt (Electrical Engineering Branch Facilitatory, ECTG Engineering Category). l /l6V / H. L. Abercrombie RCD:JDS:JB:CS RIMS, MR 4N 72A-C (B25 '861126 028 and B25 861126 031) cc: T. C. Price, 5-212 SB-K t' 0385T L
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