ML20209F590
| ML20209F590 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/13/1987 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML20209F563 | List: |
| References | |
| FOIA-87-216 NUDOCS 8704300325 | |
| Download: ML20209F590 (3) | |
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DAILY REPORT - fiEGION IV 2
4 DATE: MARCH 13, 1987
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LICLff LE/FACIL1fY NOTIFICATION / SUBJECT DESCRIPf10N OF ITE.M OR EVENT r
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SUUTH TLXAS PROJECT TELECON FROM SRig TELE. CON At ABOUT 11:00 P.M.
(CST) ON 3/11/87, DURING HOT FUNLT 10NAL t
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UNIT 1 BETWEEN LICENSEE AND RIV TESTING (HFTP A STEAM / WATER t1AMMER EVENT OCCURRED IN THF
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9 DH 50-498 WATER HAMMER IN COMPONENT COMPONENT COULING WATER (CCW) LINES SERVICING THE RHR HEAT 10 COOLING WATER SYSTEM EXCHANGER TRAINS B AND C.
RHR TRAINS B AND C WERE E'EINO I
18.
F1 ACED IN SEF<VICE.
AN OFERATOP APPARENTLY OVERLOODED i
IJ.
A 1EP IN THE PfkOCEDURE WHICH LED TO VALVING IN THE 13.
PRIMAhY SIDL LF' Tile h IR HEAT EXCHANt3Eks W1THOUT HAVING t.;t'W 10.
FLOW ESTABL194CD.
PRIMARY TEMF ERATURE WAS AT AFF10XI-1 *s.
MAIELY 350 D(6REES F.
WHEN CCW FLOW WAS ESTADLISHED.
16.
EXTkEME FLUCTUATION OF CCW SURGE TANK (EVEL WAS I1 E MF'LR I E NCE D.
LlluD BnNUING AS'20CI AIED Wi1H CCW Tfi41NG I4 IV.
AND 1: WAS te.AhD IN IHE hEAC IUN t UNI A (NME N I fiulLDLNG AND 6
19 MLL%4NILAL AUX 1LI ANY BUILD 1Nti.
THE SYSTEM WA's bECubE D.
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A OUICL EVALUATION INDICATED ONE f40X SU670RT, THREE j
21.
HArLEkS. AND Uf4E SECT 10N UF CCW PIPING WERE t<ADLv DAMAGED.
!j 24.
OTHER MINON DAM 4 tie WAS ALSO AF FAhENT.
ON 3/13/87, THE f
LILEN2E EEIW1t D THaT APFkuX1MAfELV !* a s.DD1IIONnL HAPhthS e
- 0 WLRL t<ENT OR hod LOO 5h ANCHUR l'UL YS n3 A hEStit.T OF fHE J'i.
IFnNCI E N I.
Al i HF T AC T IVI T IE S HAVE DLE N PUT ON HUL D V6.
FtNDitKi AN ENGINLERING AND OFERATIONth kVALUATION.
THIS j
27.
INCIDE NT HAS DEEN DETERMINED TO BL A RtPORIAL4LE ITEM 2 14 Ffk 5't.t5(ED.
A REFORT WILL bE ISSUED OY THE LICENSEE
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W11HIN Xs DA f ts.
$1.
1HL LJCENSEE ICSUEb A F hESS RE LEnSL L4tt ON 3/12/U/.
1Hf+t H4S DEFN INf6 REST t*Y THE (JEWS MEDI A DECAUSE THIS
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E Vt,N T HAS D4L F O f ENTI AL 10 DELAY ftfLL LOADING.
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$1 sib March 13, 1987 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-87-09 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The infonnation is as initially received without verificaticn or evaluation, and is basically all that is known by the Region IV staff on this date.
FACILITY: South Texas Project, Onit 1 Licensee Emergency Classification:
Bay City, TX Notification of Unusual Event Houston Power & Lighting Alert DN:
50-498 Site Area Emergency General Emergency
___X_ Not Applicable
SUBJECT:
WATER HAMMER IN COMPONENT C0OLING WATER SYSTEM At about 11:00 p.m. (CST) on 3/11/87, during Hot Functional Testing (HFT) with primary system temperature at 350 F, a steam / water hanner event occurred in the Component Cooling Water (CCW) lines servicing the RHR heat exchanger Trains B and C.
RHR Trains B and C were being placed in service. An operator apparently overlooked a step in the procedure which led to introducing water to the primary side of the RHR heat exchangers without having CCW flow established. When CCW flow was established, extreme fluctuation of CCW surge tank level was experienced.
Loud banging associated with CCW trains B and C was heard in the Reactor Containment Building and Mechanical Auxiliary Building. The system was secured.
3 A quick evaluation indicated one box support, three hangers, and one section of CCW piping were badly damaged. Other minor damage was also apparent. All HFT activities have been put on hold pending an engineering and operations evaluation.
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I The licensee has issued a press release.
The state of Texas will be informed.
Region IV received notification of this occurrence by telecon fan the SRI at 8:00 a.m. 3/12/87. Region IV has informed IE/NRR/SP/PA.
This information has been confirmed with a licensee representative.
CONTACT:
G. L. Constable (FTS 728-8151)
DISTRIBUTION:
MAIL:
-H. St.
MNBB E/W Willste
%DWiDMB (Original)
Chairman Zech ED0 IE NMSS D0T:(Transonly)
OIA RES Conn. Bernthal PA Comm. Roberts ELD AECD FAX:
Conn. Asselstine MPA VIB TWO Conn. Carr NSAC ACRS SP (Air SECY Phillips Rights)
CA NRR RRI PDR DCS NRC OC LICENSETi~-
Regional Offices (ReactorLicensee)
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1 D:0RSP RA EHJo cs RDMa kf Transmitted via 5520 p
3/13/8 3/13/8 0 8:50 a.m.
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PN CHECKLIST (Reference Pelicy Guide No. 1910) 1.
The technical information was confirmed with the licensee.
1/E G S ff %
Gjw m $w er y llf WMe (Name/ Title)
(Date/Titne) 2.
Notified: PA0 WW or (Section Chief) 3.
Notified: RSLO or (Specify Name)
/,e/k Ih z s u r e 4.
Informed:
NMSS d'
(MaterialsOnly) 5.
Followup / supplemental PN will be issued
// veed)
(Date')
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$1-3ffo March 13, 1987
~'CRELIMINAM NOTIFICATION OF EVENT OR UNUSUAL OCCU This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance.
without verification or evaluation, and is basically all that is known by R:gion IV staff on this cate.
FACILITY: Scuth Texas Project. Unit 1 Bay City. TX Licensee Emergency Classification:
Houston Power & Lighting Notification of Unusual Event
~ Alert DN: 50-498 Site Area Emergency General Emergency l Not Applicable
SUBJECT:
WATERHAMMERINCOMPONENTCOOLINGWATERSYSTEM(UPDATE)
At about 11:00 p.m. (CST) on 3/11/87, during Hot Funct 4
i the Component Cooling Water (CCW) lines servicing the Residual Heat Re i
heat exchanger Trains B and C.
Operational errors occurred while placing the CCW flow after the primary flow had been established A shorter delay occurred in Train C.
The results were an extreme fluctuation in
_ CCW surge tank followed by loud banging associated with both Trains B an These systems were secured and an evaluation started.
On 3/12, the engineering review determined that 30 hangers / supports were damaged and two dents in the C pipe were identified.
All apparent damage was limited to Train B.
analysis indicates that the pipe was not overstressed.
Engineering was performed on the Train B and C RHR heat exchangers. A satisfactory leak test samples were analysed for cross-contamination and found to be negative. Additionally 3/13/87. the licensee resumed HFT which is scheduled to be completed Sunda 4
Early March 15.
After cooldown from HFT system damage will be repaired.
analysis of the occurrence will continue by the licensee and site contractors.
Further (c:nt'd.onnextpage) i DISTRIBUTION:
H. St. _
MNBB E/W Willste 11NTDMB(Original)
MAIL:
4 Chairman Zech EDO IE NMSS Com. Bernthal PA OIA RES DOT:(Transonly)
Com. Roberts ELD AE00 Conni. Asselstine MPA VIB FAX:
Comm. Carr TNF0 i
ACRS NSAC SECY Phillips SP (Air CA NRR Rights)
PDR DCS RRI NRC OC Regional Offices LICENSE F (Reactor TTc~e~nsee) 0:DRS EHJohnson:cs F
n lO 3/13/87 3 3/87 j
67pagpsa 2/f yf yf u.o..ite.a vi. ss2o o_3asy _ _ -
--- W M -
~
SNib March 13, 1987 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The infonnation is as initially received without verification or evaluation, and is basically all that is known by the Region IV staff on this date.
FACILITY: South Texas Project, dnit 1 Licensee Emergency Classification:
Bay City, TX Notification of Unusual Event Houston Power & Lighting Alert DN: 50-498 Site Area Emergency General Emergency
___XiNotApplicable
SUBJECT:
WATER HA>NER IN COMPONENT COOLING WATER SYSTEM At about 11:00 p.m. (CST) on 3/11/87, during Hot Functional Testing (HFT) with primary system temperature at 350 F, a steam / water hansner event occurred in the Component Cooiing Water (CCW) lines servicing the RHR heat exchanger Trains B and C.
RHR Trains B and C were being placed in service. An operator apparently overlooked a step in the procedure which led to introducing water to the primary side of the RHR heat exchangers without having CCW flow established.
When CCW flow was established, extreme fluctuation of CCW surge tank level was experienced.
Loud banging associated with CCW trains B and C was heard in the Reactor Ccntainment Building and Mechanical Auxiliary Building. The system was secured.
A quick evaluation indicated one box support, three hangers, and one section of CCW piping were badly damaged. Other minor damage was also apparent. All HFT activities have been put on hold pending an engineering and operations
=
evaluation.
Th2 licensee has issued a press release.
Tha state of Texas will be infonned.
R;gion IV received notification of this occurrence by telecon from the SRI at 8:00 a.m. 3/12/87.
Region IV has informed IE/NRR/SP/PA.
This information has been confirmed with a licensee representative.
CONTACT:
G. L. Constable (FTS 728-8151)
DISTRIBUTION:
MAIL:
H. St.
MNBB E/W Willste INi:DMB (Original)
Chainnan Zech ED0 IE hMSS DOT:(Transonly)
Comun. Roberts ELD AE00 FAX:
Conan. Asselstine MPA VIB TWO Conan. Carr ACRS NSAC SP (Air SECY Phillips CA NRR Rights)
RRI PDR DCS NRC OC LICENSE F Regional Offices (ReactorLicensee)
D:DRS RA E7 NN EHJ:
.cs RDMartj 4
3/13/87 3/13/87 Transmitted via 5520 e -
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