ML18024B032
| ML18024B032 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 08/31/1979 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 7909280672 | |
| Download: ML18024B032 (6) | |
Text
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TENNESSEE VALLEYAUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II August 31, 1979 Mr. James P. O'Rei1ly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II Suite 3100 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
OFFICE OF ECTION AND ENFORCEMENT BULLETIN 79 RII:JPO 50-259, 50-260, 0-296 BROWNS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 In response to your July 2, 1979, letter (as amended on August 15, 1979) which transmitted IE Bulletin 79-14, we are enclosing the results of our investigations at Browns Ferry for item 2 (Enclosure 1).
Also provided is a revision to our August 15, 1979, response to item 1 of the Bulletin (Enclosure 2).
If you have further questions, please get in touch with Tish Jenkins at FTS 854-2014.
Very truly yours, TENNESSEE VALLEY AUTHORITY
. M. ills, nager Nuclear Regula ion and Safety Enclosures cc (Enclosures):
Mr. Victor Stello, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 Director of the Division of Operating Reactors Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 V9092 80/ P~
An Equal Opportunity Employer
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ENCLOSURE 1
RESPONSE
TO ITEM 2 OF IE BULLETIN 79-14 DATED JULY,2, JULY 18, AND AUGUST 15, 1979 FOR BROWS FERRY NUCLEAR PLANT SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS A description of.the inspection program fox IE Bulletin 79-14 is described below.
Inspections are being performed on all safety-related piping 2-1/2 inches in diameter and greater which are seismic category I.
Elements of the inspection include the following:
l.
Inspect all pipe hangers and restraints for conformance to the design drawings (both configuration and location),
and record verification. All hangers shall be within + 1.0 foot of design location.
2.
Verify that all valves 2-1/2 inches and larger are installed as specified'y the design drawings (orientation of valve and operator);
and record valve type, manufacturer, model number, and operator manufacturer and model number.
3.
Verify that piping configuration conforms to the design drawings, and record verification.
4.
Verify that piping that penetrates walls or floors has clearance all
- around, and record verification on data sheet and the design dxawings.
(Indicate on drawings only those places where the pipe is touching the penetration.)
5.
Notify EN DES promptly regarding all possible nonconformance for analysis of hanger acceptability and system operability.
The attached table is a summary of our inspections to date.
IE BULLETIN 79-14 PROGRESS REPORT BROWNS FERRY NUCLEAR PLANT AUGUST 30, 1979'i
'e Su ort Ins ections'ignificant Deviations*
~Re aired RHRSW ll 6
1 RBCCW 2
RHRSW 3
RHRSW TOTAL 103 349 53 0
120 0
Valve Ins ections 1
RHR 1
HPCI 30 17 0
0 TOTAL 47 0
- Si nificant Deviations The hanger is not capable of performing intended function (missing nuts, broken bolts, broken welds, etc.)
being repaired on emergency basis.
Insi nificant Deviations Capable of still carrying load, operable (missing lock nuts, lock wire, etc.) - will be repaired but not taking hanger out of service or on emergency basis.
- One in high radiation area working with Health Physics to get into area loose nuts and one missing,
ENCLOSURE 2
REVISED RESPONSE TO ITEM 1 OF IE BULLETIN 79-14 DATED JULY 2, JULY 18, AND AUGUST 15, 1979 FOR BROWNS FERRY NUCLEAR PLANT SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS In TVA's response to item 1 dated August 15, 1979, TVA committed to inspect the safety-related piping on unit 1.
However, it has been decided that all three units should be inspected as required by the bulletin.
Therefore, the inspection program as outlined in the August 15 response and Enclosure 2
will be performed on units 1, 2, and 3.
The planned schedule for performing
=
these inspections is provided below.
Accessible Areas Unit 1 Inspections to be completed by January 15, 1980.
Unit 2 Inspections to be completed by August 15, 1980.
Unit 3 Inspections to be completed by April 1, 1980.
Inaccessible Areas Unit 1 Inspections will be performed corresponding to unit outage (November 1, 1979-January 15, 1980).
Unit 2 Inspections will be performed corresponding to unit outage (October 15-Novembex 25, 1980)
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Unit 3 Inspection will be performed during present outage which is to be completed by December 1, 1979.
It should be noted that if significant nonconformances are discovered in one unit, the same systems will be inspected on the units which have not already been inspected, as soon as possible.
Failure of a single hanger initiates an analysis of the system to determine system operability to comply with technical specifications.