ML19322A626
| ML19322A626 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/03/1971 |
| From: | Seidle W US ATOMIC ENERGY COMMISSION (AEC) |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7911210698 | |
| Download: ML19322A626 (3) | |
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ATOMIC ENERGY COMMISSION V p
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230 PE ACHTR EE STREET, N CR T r4 W E ST 4
- Fil 4 A T I.A NT A, G E OR G I A 30303
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J. P. O'Reilly, Chief, Eeactor Testing and Operations Branch (2)
Division of Compliance, Headquarters CCMPLIANCE IMUIRY C'ORANDUM NO. 2c9/71 wu rwsn COMPEiY (CC03EE 1),
LICENSE NO. CFPR-33, DOCET NO. 50-269 - POSSIBLE RZACTCR VESSEL INEALS DAMAGE On April 28, 1971, at 11:50 a.=., J. W. Hampton, Assistant Superintendent, Oconee Nuclear Station, advised C. E. Murphy, Reactor Inspector, Region II, that during a test of the core flooding system operation, two du==y fuel elements in the vessel had been dislodged from their seats and fallen against the vessel internals. The folleving preliminary information was given:
1.
Two dummy fuel elements (containing no uranium) had been stored in the reactor vessel in pcsitions 1C23 and 1C53. (See Exhibit A.) The ele-
=ents were inserted into the lover grid but the only support at the upper ends was derived frem leaning the elements into the corners of the core barrel. No fuel was in the vessel or the transfer canal.
2.
The licensee was conducting the core flooding system flev test to verify the operation of the systes check valves. The reactor vessel had been filled with water and the fuel transfer canal was filled to within four feet of the top. The head was not on the vessel.
3.
When the ch.ak valve opened, the du==y elements were dislodged frem their seats and the tops fell against the vessel internals. The dis-tance of travel of the upper end of the dt y fuel elements was not known. 'Ihe lower ends remain at approx 1=ately their original positien.
4.
Ha=pton stated that approximately 9k0 cubic feet of water had been du= ped into the vessel. The time required or the approximate velocity was not known at the present time. No pumps were involved. Pressure in the CF tank at the time of the test was not known by Ha=pton.
5 The extent of da= age, if any, to the internals is not known at present.
The licensee is presently draining the water to examine the internals.
6.
The licensee vill advise the inspector if any da= age is detected, but he does not plan to issue a formal report.
Rec'd on Date eg, w
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J. P. O'Reilly May 3, 1971 Our inspector will follow up on this ' incident during his next site visit scheduled for early May.
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(L W.C.Seih CO:II:CEM Senior Reactor Inspector
Enclosure:
Exhibit A cc w/ encl:
E. G. Case, DRS (3) l P. A. Morris, DRL R. S. Boyd, DRL (2) i:
R. C. DeYoung, DRL (2)
D. J. Skovholt, DRL (3)
P. W. Heve, DRL (2)
A. Giambusso, CO L. Kornblith, Jr., CO R. H. Engelken, CO J. B. Henderson, CO R. W. Kirkman, C0:I B. H. Grier, CO:III J. W. Flora, CO:IV R. W. Smith, CO:V REG Files 4 #
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sheet 7 of 7 X
FUEL TRAllSFER t-
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CAllAL 1C23 1C24 1C'26 1C50 1C49 053 054 c55-076 075 IC21 1C25 1C27 1C47, IC!'6 1Ch6 1C19 !.020 1C22 045 o':0
- C30 052 C3L 056
'C.!,2 l 074 073 IC16 1C18 1017,~
035
,C29 051
.C32 057
'C hl.
072 071 1320
.122S E27 E19 E30 1C44 01:3 044
.c23 E45 1Ch3, I 1C13 1C15 1C14 1218 E19 E13 U.35 17.26 E31 G32 1C41 1Ch2 104o o41 042 C22 037 Ao4 033 Cze oso Aos oss
'Cho 070 C69 1Cl2 1C11 ul" E16 E12 M30 MOS 1135 1339 G33 133h 1C35 1C39 Cho C21 036 C2C' 032
-CIS 031 C27 077 C33' 059 C39 C65 1C57 1C55 E22 1221 1315 1A29 MC5 M25 O2'( M32 E2?
E35 D36
}c35 1C37j 088 Ch9 039 Ao3 035 C17 029 C16 030 C2h Ck7 Ao6 030
' C3S-
. 057 l ICSS 1C55 Eh6 1314 11.3 1 M23 1A2h 2A17 M15 1A14 M33 1324 D37 102 1 103:
069 oS7 ChG' 034 C19 c28 C15 c24 Cil 023 C25 ch3 C34 061 OH
'.O,.
V IC6C 1C59 E47 1Ah C' M22 M2L Mio M16 Mll Mit
'A13 M3'i 1525 1:29' E37 090 C50 086 C60 027 Clk-C26
-d2 021 Clo C22 C26 ch'9 CSS 06.
3 1C5) 1C62 19h8 1B43 M39 lA19 1A16 MOS iA69 Mio Mol EC9 1233-1C31 1C32 091 092 C51 031.Ch5 C25
. C13' c19 C9 o20 Cos 013 C36 C63 C:-
106h 1C63. Eh9 1350 2 *.2 1533 1Ao7 MC6 1ACS 1A01 BCS EoS 1307 1~ 33, 1:3 '.
09',
CS2 093 Ao?
CEO C44 013 CCS of7 CC6 C12 Ac?
010
.,C37,'
C65 C65 1C66' 1351 3 52 E4o M37 2Ao.
11.03 Elo 120-'
-13C1 1CC6 1010 f
095 C53 096 C 5.4 078 Ch3 016 507 014 Coh col Co3 -
011 1C68 1C61 1C79 1333 D54 E41 ML1 1311 15C2 B os 1 Col 1007.
10C:: ~.
t 098 097 C59 099 ACS 079 C6i 015 A01 CC9 CCl 0C5 CC i
1C00 1C78 1C73 E55 ES-)
ELS 1344 leo 3 1Co3 1CC4 1002 103 107
'CSSC 100 C55 CS3 Ch6 Co7 CC3 ' 003
'CO2, 1C77 1C75
- 1C73, 1Cd9 1C70 1C 51 1052 1009 1C05 105 103 C51-101 C53 oS2 C.h7 00S
- c04-
[lC'ih IC72 1C71 1C54 1C53 lloh J03 102 c65 OS4 21 2
'3 4
5 0'
7 8
0 10 11 12
- 13 14 15 z exu.l
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.s lao 1 (h ouch 1 *.51 E 2.00 v/o Fuel Assemblic's.
1Bol thri c.:.1B56 5 2.10 v/6 ;'uel Asse:b31es
'1C01 threcch 1000 I 2.15 v/o Fuel Acce:* lies
' Col threuch-C61 i Centrol lied Asoc blics Exhibit /.
Cool?tlucAi;166.JoS. sor.1;;ii c;res;;gea.7,sjig Pageldf1 p
Ao1 throur.h AOS I Axial l'cyer Shapini; 1:od Assc=b g R]
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