ML19318D262
| ML19318D262 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/30/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8007080331 | |
| Download: ML19318D262 (3) | |
Text
,_
TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37 -M 400 Chestnut Street Tower II June 30, 1980 Mr. James P. O'Reilly, Director Office of Ins tion and Enforcement U.S. Nuclear Ra story Commission Region II - Suit 3100 101 Marietta Stree Atlanta, Georgia 3 3
Dear Mr. O'Railly:
SEQUOYAH NUCLEAR PLANT UNIT 1 - NRC-OIE REGION II LETTER RII WHM 30-327/80-17 AND 50-328/80 INSPECTION REPORT - RESPONSE TO DLVIATION ITEM 50-327/80-17-01 The subject letter dated June 5,1980, cited TVA with one deviation in accordance with 10 CFR 2.201. Enclosed is our response to that deviation.
If you have any questions concerning this matter, please get in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation and Safety Enclosure f
Mr. Victor Stallo, Jr., Director (Enclosure)V cc:
office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 S/!/
An Equal Opportunity Employer
9 ENCLOSURE
~
SEQUOYAH NUCLEAR PLANT UNIT 1 INADEQUATE FIRE BARRIERS DEVIATION ITEM 50-327/80-17-01 Deviation TVA's response to NRC question No. 1 on the Fire Protection Program 4
Reevaluation (FPPR) states that the redundant circuits for the steam generator pressure instrumentation were inadequately separated. Table 1.J in the'FPPR states that these circuits will be wrapped in a 1-inch "Knowool" insulation from the containment penetration at elevation 734 to the Q-line wall penetration at elevation 714 to provide a 1/2-hour fire rated barrier between circuita. The construction completion date 4
stated for this item was October 5, 1979.
l Contrary to the'above, the installation of the fire rated insulation barrier was incomplete on May 15, 1980, due to the following:
1.
Approximately four feet on all seven conduits adjacent to column line AS/X at elevation 714 were not adequately insulated.
2.
Several short lengths of conduit adjacent to column line A4/W were 1
not adequately insulated.
3.
The conduit fittings and connecting conduit pipe adjacent to column line A4/U at elevation 714 were not insulated. Also, cover plates were not installed on three conduit fittings resulting in inadequate.
protection for the wiring within the conduit.
It is possible that other portions of these conduits may be inadequately or improperly insulated.
4 Corrective Action Taken and Results Achieved The discrepancies are addressed below.
1.
The required insulation has been installed for approximately four feet on-all seven conduits located adjacent to column line A5/X on elevation 714.
2.
Insulation has been installed on the several short lengths of conduit adjacent to column line A4/W.
3.
The cover plates have been reinstalled on three noted conduit 4
fittings and connecting conduit adjacent to column A4/W on l;
elevacion.714.
AnLinspection of the involved conduit runs between the containment-penetration on elevation 734 and the wall penetration at the Q-line
~
l i:
on elevation 714 has been conducted and disclosed no additional areas of missing insulation.
l.
L
-~--m.
r
.. _ ~ -... - -..
e
ee l
Steps Taken to Avoid Further Recurrence Not applicable.
Date of Full Compliance All of'the above work is field complete at this time on our maintenance request No. 61332 and workplan No. 8166, RI.
Post installation verification
' by our Quality Assurance Staff is not yet~ completed, but will be completed
- by July 7, 1980.
9
\\
e b
e e
O V