ML20090E187
| ML20090E187 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 04/02/1974 |
| From: | Perkins T NIAGARA MOHAWK POWER CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20090E186 | List: |
| References | |
| AO-50-220-74-3, NUDOCS 8303140104 | |
| Download: ML20090E187 (1) | |
Text
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ABNOmnt GCCURRENCE REPORT 50-220-74 MSIV LEAKAGE FEFSUANI TO TECHNICAL SPECIFICATION 1.13 e hT ARP RFPORTIU AS AN ABNOM1AL OCCURREhTE T1tE Fall.URF OF 10T1I TNSIDP HAIN STEAM IS01All0N VALVES I
' w._10 MEET THE REQUIRED LEAMGE LIMIT AS ESTABLISitED IN TTCID;iCAI, SPECIFICATION l
[
4.3.3.e(4),
ON APRIL 2,1974. IN ACC0klW CE KITE TECHNICAL SPECIFICA110N 4.'s.3.e(4)
THE FOUR (4) MSI\\"S hTRE IJAr TESTED. T1E OUTSIDE VALVES IN EACH LINE (2)
SUCCLSSRJLLY PASSED *illE i,EAK RATE TFST WIT 11:
7112 7,8S SCF11
- 122 0.24 SCFil 11tF I.IMIT FOR INDIVIDUAL VALVE LEAKAGE HAS BEEN ESTABLISHED AS 12.9 SCFH.
THE INSIDE YALVES IN EACII LINE LEAKED IN EXCESS OF 180 SCFIl.
UNDER ACCIDENT CONDITIONS BOTE FMIN STEAM LIhT.S K'0ULD BE ESS0hTI ALLY LU.K TIGl'T T1E RESULT OF TriE LOW LEAKAGE THROUGH THE OtTFSIDE VALVES.
TimREFORE, NO HAZAkb WOULD BE PRESElilED 'lO 'lHE GENERAL l'UBLIC.
WE CAUSE OF Tile EXCESS 1\\T INSIDE VALVE LEAKAGE h'00LD OCCliR AS A RE5UI.T OF:
1.
IMPROPERh0SITIONSWITCll 2.,
IMPROPER SEATING OF T1!E DISC.
KE ARE PRESEh7LY IESTING 10 DETERMINE THE CAUP.E OF THE LEAKAGE.
~-
COP.RECTIVE ACTION KTRILD T1LEN DICTATE:
1.
READ.IUSTMENT OF TlE POSITION SFTTING 08 2.
FMCIIIbT i,APPTNC OF WE VALVE SEAT, 1110 MAS J. PERKINS STATION S11PERIhTf.N3EbT-
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