ML20058L124
| ML20058L124 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 10/22/1975 |
| From: | Day B, Mayer L NORTHERN STATES POWER CO. |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| References | |
| LER-LER-751022, NUDOCS 9105070409 | |
| Download: ML20058L124 (2) | |
Text
,
,.9'-
LICENSEE EVENT REPORT CCNTnOc8toCx1 I
I l l 1 1
- PaAu P::wT u nEcumco mrcamTic=3 l-1 6
AME LCENSE NuvBER v E v E
@ lM lN l Ml Nl Pl1]
l 0l 0l-l 0 l 0] 0l0 l0 l-l 0l0 l l 4 l 1 l1l 1l1 l l0 l 1l 7 89 34 15 25 26 JO 31 32 CATEGORY T
R DOCaET NuvBER EVENT DATE RF' ORT CATE O
CON'T l P l 0 l M W
(0j" l 0 l-l 0 l 2; 6l 3l l 1l Oli l 2 l 7 l5 l l1 l 0 l 2121 7! 5 I 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION 02 l During feedwater sparger replacement, incidations of crac. king on inner blend rd tij 7 89 ec BE l of four reactor vessel feedwater nozzles revealed by li.guid penetrant exandnation. l 7 89 80 3E I No erevious similar occurrences.
Indications are beine removed by crindine.
Finai 7 89 60 3E l results of grinding will be submitted in report to follow. ( A0 263/75-204 7 89 to im i I
80 7 89 mE
' EDE C
CODE COMPONENT CODE R
M A
votATON E I ci Al LaJ Iv It i s t si rit i 11J Icish 10 I LNJ 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION DE l Nozzle blend radii cracking caused by leakage of feedwater past thermal sleeve 7 89 80 EE lcw=4ne th, mm 1 inna ne bland enait Will in<:t211 4-n roved the-n! riceve l
7 89 80
$ I as recomanded by comoonent sunolier (General Electric).
I FACiutv ME%DD OF STATUS
% POWER OTHER STATUS DGCOVERv OfSCOVE Av DESCR# TION d
l0l0l0l lNA l d l NA l
1 7 8
'9 10 12 13 44 45 46 60 Foau or q
RE E ED OF EL ASE AMOUNT OF ACTiv6Tv LOCATON OF RELE ASE E
LU LU l NA l
l NA l
7 8 9
10 11 44 45 80 PERSONNEL EXPOSUAES NUMBER TvPE DESCRiPTON Q l 0l0 p l y l NA l
7 89 11 12 13 90 PERSONNEL INJURIES NuvsER DESCRmou M 1010 b I INA l
7 89 11 12 80 OFFSITE CONSEQUENCES H I NA I
7 89 80 L
LOSS OR DAMAGE TO FACILITY TvPE DESCRsPTON g] l NA l
7 89 10 80 PUBLICITY y l NA l
7 89 80 ADDITIONAL FACTORS Q l SA l
7 89 80 bI l
00 7 89
/*'
Byron D. Day (612) 295-5151 J
nauE; PHONE:
e 3'
m......,
9105070409 751022 C
W 8
,.t-.
3.
NSP NOHTHERN 5TATES POWER COMPANY M I N N E A PO L.l S. M I N N E S OTA 95400 October 22, 1975
\\
p..
M r. R. S.
Boyd, Acting Director J
Division of Reactor Licensing U. S. Nuclear Regulatory Com: ission
\\;_
i.
Washington, DC 20555 Yf' a
/
s,
Dear Mr. Boyd:
MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Discovery of Feedwater Nozzle Surface Cracks The Licensee Event Report for this occurrence is reproduced on the back of this letter.
Yours very truly, r
h,Y L 0. Mayer, PE
,>/'n.-
Manager, Nuclear Support Services 4.'[ /[,
LP/MHV/ deb
'/
87[
h~f
\\-
cc:
J. G. Keppler
}.,.
4, e,
)
G. Charnoff x-MPCA
'(
s.
Attn: J.
W.
Fernan
'l
w _p*i '
's i
r
-ocer-
.