ML20215D914
| ML20215D914 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/08/1986 |
| From: | Jordan C, Mcnutt G, Sarver T TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20215D785 | List: |
| References | |
| 237.6, 237.6-R, 237.6-R00, NUDOCS 8612170126 | |
| Download: ML20215D914 (3) | |
Text
e 1
TVA EMPLOYEE CONCERNS REPORT NUMBER:
237.6 SPECIAL PROGRAM REPORT TTPE:
Rationale For Non-Inclusion REVISION NUHBER: 0
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as Restart Item TITLE: CasinE of Current Transformers PAGE 1 0F 3 REASON FOR REVISION:
PREPARATION PREPARED BY:
T. L. Server (see Sheet 2 for signature) 10-10-86 SIGNATURE DATE C. W. Jordan (see Sheet 2 for signature) 10-10-86 REVIEWS PEER:
SIGNATURE DATE lE <~ N SIGNATURE DAT1 CONCURRENCES WW CEG-H:
G.
. McNutt 10-24-86 SRP' u
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d$/2 4-h SIGNATURE DATE SIGNATURE
- DATE APPROVED BY:
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N/A ECSP MANAMR DATE MANAGER OF NUCLEAR POWER DATE CONCURRENCE (FINAL REPORT ONLY)
- SRP Secretary's signature denotes SRP concurrences are in files.
2085T 8612170126 861210 PDR ADOCK 05000327 P
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SEQUOYAH NUCLEAR PLANT ENGINEERING RELATED EMPLOYEE CONCERNS SPECIAL PROGRAM NON-RESTART JUSTIFICATION
SUMMARY
l SUBCATEGORY / ELEMENT 237.6 The employee concern regarding current transformer (CT) gasing and the resulting need for sampling is not a restart item for the following reasons:
a.
Sampling of the cts' oil for gas content is a planned activity.
Therefore, the unavailability of one of the offsite sources will be-known in advance and precautions can be taken to minimize any adverse effects.
b.
The cts are part of the transmission system and not part of the s
class 1E safety systems of SON.
c.
Multiple offsite sources exist at SQN, therefore loss of one source due to failure of a CT will not jeopardize plant safety or operation. Additionally, complete loss of offsite power is a design basis condition.
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ATTACHMENT: List of Issues for Electrical ELEMENT NO.
237.6 0
.Date:
0040/86.
Evaluator Date
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.m-LIST U ELECTRICAL ISSUES
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SGN RESTART - NO ELEE NT N 7.6 BY:
T. $arver Date: 09/09/86 e's,
?f Gasing of Current Transformers ELEENT iMERE RESPON-CONCERN NUMBER (S)
!$ SUES ADDRE SSED SIBLE CENERAL APPROACH /ETH000 LOGY FOR ELEEhT REPOST WI-85-060-N02 1.
Current transformer is *gasing" 237.6 15 1.
Review TVA program for monitoring of CT gases.
'TVA's prchlem with gasing of (generating explosive gases within) current transformers has led to which leads to outages of Itnes and 2.
Estabitsh ef fects of f ailure.
outages of Itne and bus ties to bus ties.
3.
Check todustry sources for similar occurrences, obtain oli samples and detern.ine gasing condition.*
2.
Outages are required to obtain oil 237.6 TS sanples to monitor gasing conditions.
4.
Review TVA plans to evaluate the need for manual sampling.
5.
Explore industrial response to problem.
6.
Compare TVA's approach / solution with industries.
DOCUEhTS NEEDED FOR REVIEW 1.
TVA studies / report 2.
Suppiter studies / reports 3.
Current articles and publications on this subject.
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