ML19350C592
| ML19350C592 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 03/26/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0619, RTR-NUREG-619 NUDOCS 8104060265 | |
| Download: ML19350C592 (4) | |
Text
b TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II March 26, 1981
~ b.s 9
Director of Licensing
(-
Attention:
Mr. Thomas A. Ippolito, Chief
'h Operating Reactors Branch No. 2 k
Q U.S. Nuclear Regulatory Commission d
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Washington, DC 20555.
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Dear Mr. ~ Ippolito:
In the Matter of the
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Docket Nos. 50-259
' NT Tennessee Valley Authority
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50-260 50-296 We have reviewed I?JREG-0619, "BWR Feedwater Nozzle and Control Rod Drive Return Line Nozzle Cracking," and find that the nondestructive examination (NDE) requirements described therein do not appear to be directly applicable to the control rod drive return line configuration at the Browns Ferry Nuclear Plant. For that reason we require an interpretation from your staff.regarding the acceptability,and adequacy of our planned NDE program.
Enclosed is our program for NDE of the Browns Ferry control. rod drive return line f.iping. We plan to perform this examination work during the Browns Ferry unit 1 refueling outage now scheduled to start April 10, 1981. Therefore, to avoid adverse impact on.our
. schedule for performing the NDE work, we need to have your formal' comments or.. concurrence by June to, 1981. Because of the tremendous workload involved in this' outage, it'is particularly important to keep.the required work on schedule.
If, we do not hear,from you by this' date, we will asstne that you concur with our proposal.
We also propose an alternate inspedtion interval'in the enclosur2.-
We request that you please inforrt us11n writing of the acceptability-of that proposed alternate by-June 10, 1931. This has been discussed with R. J. Clark of your staff.
Very truly.yours,-
L.TM. Mi Is, nager Nuclear' Regulation and Safety J1 Subscribe 'jnd worn to be ore
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,is this?
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day'of 1981.
[ Notary Public It Cc h i sion Expires Enci.osureL h
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- 8104060 hi
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4 ENCLOSURE i
PROPOSED PROGRAM OF NONDESTRUCTIVE EXAMINATION OF CONTROL ROD DRIVE RETURN LINE PIPING BROWNS FERRY NUCLEAR PLANT (DOCKET NOS. 50-259, -260, -296)
BACKGROUND The control rod drive (CRD) return line at Browns Ferry Nuclear Plant (units 1, 2, and 3) is rerouted -into the reactor water cleanup (RWCU) system for return to the reactor vessel. A thermal mixing tee (detailed in figure 1).is used for the connection of'the CRD return line to the RWCG system (see figure 2).
NCE. PROGRAM
'To comply with 'the requirements of NUREG-0619 (section 8 2, item 3(a)),
our planned nondestructive examinat. ions shall be a final PT of the nozzle-cap weld;. ultrasonic examination of weld RCRD-1-45 (figure' 2)',
and the base metal, on both sides, to a distance of.55 inches; and ultrasonic examination of the base metal in the tee opposite the Incoming CRD return flow, down to and, including weld RCRDS-1-3 Ultrasonic examination shall'also be' performed on RCRDS-1-44.
INSPECTION ~ INTERVAL We propose to perform the aboye.NDE program for three successive
~
refueli ng-outages.
If no unacceptable indications.are found,.the examinations.willfrevert back to-those required by ASME Section;XI.
If unacceptable indicat. ions are foundl we will comply with th'e NUREG-0619 inspection interval on an interim basis until confirming' adequacy *of-corrective' actions tak'en, if.any..'
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