ML19340B174
| ML19340B174 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/16/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, NCR-SQN-CEB-802, NUDOCS 8010210590 | |
| Download: ML19340B174 (2) | |
Text
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,377 400 Chestnut Street Tcwer.II Cotober 16, 1980
' Mr. James P. C. eilly, Director Office of Inspect on and Enforcement U.S. Nuclear Regula(ory Cocmission Tiecien II - Suite 31 101 Lu'ietta Street Atlanta, Georgia ~30303
Dear.Mr. 0'Reilly:
SEQUOYAH NUCLEAR PLANT UNIT 2 - ANALYSIS OF INTERII:DIATE BREAK LOCATIONS -
NCR SQU CEB 8027 - FIRST INTERIM REPORT Ihe subject deficiency was initially reported to URC-0IE Inspector M. Then.as en September 18, 1980, in accordance with 10 CFR 50.55(e).
Enclosed is cur first interin report. We expect to submit our next repcrt by December 8, 1980.
If you have any questions, please get in touch with D. L. Lambert at FTS 47-2581.
Ver" truly yours,
'"E:!I:ESSEE V!1 LEY AUTHORITY L. If. Mills, Manager Nuclear Regulatien and Safety Enclosure f
-cc:
Mr. Victor Stello, Director (Enclosure),V
~
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission WashinSton, DC 20555-f t8 010216 3810
ie '
. ENCLOSURE:
- SEQUOYAH NUCLEAR PLANT UNIT 2-ANALYSIS OF -INTERMEDIATE BREAK LOCATIONS NCR SQN CEB 8027 10 CFR 50.55(e)
FIRST-INTERIM REPORT r
Descriotion of Condition A reanalysis of some intermediate pie as'ak' locations performed'in 1979' by EDS Nuclear resulted in a shifting of ' reak locations on the following lines:.(1) Safety Injection (SI). Cold Leg Injection Loop 4; (2) Residual-Heat Removal!(hER) Hot Leg Recirculation Line; and (3) Resistance Temperature Device (RTD)~ Line Lcop 2.
EDS did not revise the brer:
locations en;the affected isometric - drawings ano tid not. notify T'..'
of the break location changes. As a result, the location of pipe. break restraints - for these lines may be deficient.-
Corrective Action' The SI and RTD lines have been reevaluated and 'no unacceptable interactions were found. TVA is presently conducting an evaluation'of the possible con-sequences of the postulated breaks for the RHR system.
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