ML20090B659

From kanterella
Jump to navigation Jump to search
Submits Daily Highlight for 821001.Fish-mouth Rupture Found in Previously Plugged Tube.Small Piece of Weld Rod Found in Each Steam Generator
ML20090B659
Person / Time
Site: Ginna Constellation icon.png
Issue date: 10/01/1982
From: Lyons J
Office of Nuclear Reactor Regulation
To: Carter J, Harold Denton, Eisenhut D
NRC
Shared Package
ML082380335 List:
References
FOIA-91-106 NUDOCS 8210280004
Download: ML20090B659 (1)


Text

- - _ - - - -

l, r:ur: [*"r rben'"

Th

,1 /

MEMORANDUM FOR:

HDenton RC1 ark

'. n

~

JCarter JStolz DEisenhut Tppolito O

f RPurple JHeltemes q()/A*Ml,",u.

TNovak JSniezek

(

Glainas 5Hanauer

/

6 FMiraglia RVollmer

/n WRussell RMattson SVarga HThompson d\\# f' ')

^M DVassallo JLeFleur p-THRU:

Dennis M. Cftstchfield, Chief b

Operating Reactors Branch #5, DL

~

FROM:

James E. Lyons, Project Manager Operating Reactors Branch #5, DL

SUBJECT:

DAILY HIGHLIGHT R. E. GINNA NUCLEAR POWER PLANT Rochester Gas & Electric Corporation (RGLE) has been perfoming inspections of the steam generator tubes and has discovered a rupture in a oreviet. sly

.pluaged_ steam generator tube at its R. E. Ginna Nuclear Po,wer Plant.

The rupture is a fish mouth " opening facing the steam generator wrapper.

It is 1.25 inches long, 3/8 inch at the widest opehngsand begins 3.5 inches above the t.op of the tube sheet. The ruptured tute is a tube that was plugged in January 1976 and is in the B-steam generator hot leg (R39-C69).

During video examinatf or.s as a result of the Janutry 25, 1982, steam

~

generator tube rupture. G ;s tube was characterized as having outer sur/Arg damage but the damage was not considered significaat enough to require '

removal.

The rupture was found by video inspections being performed daring the pysen_t steam generator inspection outage that RGLE had comm'- rd to

prior to restart'.ng in May.

Eddy current testing during the A ge has, shown no degradation of tubes in the periphery of the steam cenerators.,The video inspection Tiso revealed a small piece of weld rod (about 4 inches long) in each steam generator.

RGU i.nd Westinghouse are evaluatinc the situation over the weekend tc detemine a course of action.

,pm ##

./

w

,se#

/

\\

f' f

/

a

/

/

    • \\

v

\\

l/

5.'-f - }V

,? l' 3

,e s

& }f.<', y 3

JJ f

,,.h

(

y y

N---

~