ML030790388
| ML030790388 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 11/30/2002 |
| From: | Nuclear Management Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| CA026917, FOIA/PA-2003-0094 | |
| Download: ML030790388 (30) | |
Text
- ~ 7*CA 4 026917 - Review of QA-scope flow restricting devices at PBNP.
Following the October 2002 event with the ORO-04008 flow orifice associated with the OP-38B MDAFW Pump, PBNP conducted a review of all flow restricting devices that perform a QA scope function. During this event particles from the pumps discharge became lodged in the flow restrictor and limited the flow through the line to below what was normally seen. These flow restrictors use a multi-stage anti-cavitation trim package installed in the body of a globe valve to limit flow. This type of flow restrictor uses very small holes in each stage along with a torturous path to limit flow and reduce the affects of cavitation.
A printout of the CHAMPS database was used as a starting point to determine the population of QA-scope flow restrictors installed in the plant. Next, a review of the plants P&IDs was conducted to determine if any orifices were installed in Safety-Related systems that did not have CHAMPS Ids. Finally, a limited plant walkdown and interviews were conducted to come up with a total population of 61 components that function as flow restriction devices in QA scope applications (see attached Excel spreadsheet). Forty-eight of these are in safety-related applications.
The attached Excel spreadsheet also includes five components (1/2MS-279/283 and ORO-SA 001). The MS components are actually valves; however, they have a similar trim design to that used in the AFW pump recirc flow restrictors. The ORO-SA-001 components is of a similar design to the AFW Pump recirc piping flow restrictors. These five valves are installed in non QA-scope applications. While these components have experienced some plugging problems in the past, the fact that they perform no safety-related function results in these problems not challenging the plant's nuclear safety.
The Safety Injection System (HHSI, RHR, and CS) pumps all have flow restriction devices installed in their recirc lines; however, none are similar to that installed in the AFW pumps recirc lines. The HHSI pumps have multi-staged off-center orifice plates installed in their recirc lines; whereas, the RHR and CS pumps have capillary type (extended length small bore pipe) flow restrictors. These types of flow restrictors are not as susceptible to clogging as the anti-cavitation trim packages used in the AFW system. In addition, they pass primary system water as opposed to the CST and Service Water seen in the AFW system.
As can be seen in the attached Excel spreadsheet, PBNP also utilizes standard orifice plates in a large number of safety-related applications. These flow restrictors are not susceptible to small particle clogging like the trim sets installed in the AFW lines. The same is true for the large bore capillary tube style flow restrictors used at the PBNP. In addition, no capillary type flow restrictors were found installed in any safety-related applications that were not controlling primary system water flow.
The review of PBNP's flow restriction devices found only four applications (PBI/2 RO-04003, ORO-04008, and ORO-04015) where anti-cavitation trim packages were used in safety-related application. These are the flow restrictors installed in the recirc piping associated with the four AFW pumps (PBI/2 P-29 and OP-38A/B). None of the other safety-related flow restriction devices were found to have this same susceptibility to small particle clogging.
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UlC . NY P-lA RCP #1 SEAL BYPASS ORIFICE PBi RO-0198B capiar 684J741-3 (D8) U1C Y Y Y "YLP-1B RCP #1 SEAL BYPASS ORIFICE LE TDO-0W/N OR--ICFI dEX-OII F, C-E PB1 RO-00199A Capillary 684J741-3 (H6). 21/UIC/REGEN-HX RM Y Y LETDOWN ORIFICE B ORIFICE P61i RO-00199B Capillary 21/U1C/REGEN HX RM Y iFBI RO-00498 .OrificPlate (2) 1684J741-3 (H6) 21/U1C/REGEN HX RM Y Y LETDOWN ORi*ICF C ORIFICE P61 RO--045 Orifice Plate (2) 541 F09,1-1 (3) U1C Y Y RC LOOP A COLD LEG RTD MANIFOLD ORIFICE 541F091-1 (DP10) UIC Y Y jRC LOOP B COLD LEG RTD MANIFOLD ORIFICE F§1f F--.oo VB* RO.0048 _aPi!arY (2) Y Y R-1 RV-HEAD VENT FLOW ORIFICE 541 F091-2 (F5) 66/U 1C PB1 RO-00487 Capillary (2) 5*4!F091..2 (G_5) ... 66/UIC Pgi R'O0:6900A PB1 RO-00900B Orifice Plate Cap ilary (2)~
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FB i kO 6k Valve/rlrm/AdJ M-217-1 (136). 8/CBIAFP RM IP-29 CUB Y 1P-29 AFP MINI RECIRC ORIFICE caprifi2lat 2 RO-00198A Capillary (2) 685J175-3 (D6) 21/U2C/WEST STAIRS SOUTH Y IP-IA RCA #1 SEýAL BYPASS ORIFICE PB2 RO-00198B 685J175-3 (D8) U2C/P-1B RCP CUB/MIDDLE LVL E VyY lY SP-I*BiLETDOWN RCP #1 SEAL BYPASS ORIFICE A ORIFICE ORIFICE PB2 RO-00199A Capillary 21/U2C/REGEN HX-RM Vy ,Y LETDOWN ORIFICE B ORIFICE i*b iR5o-099c CapIlary-__. 8 J-H6L 21/U2C/REGEN HX RM PB2 RO-00199C 685.1175-3 IH6*
H6 211U2C/REGEN HX RM Y JY ILETDOWN ORIFICE C ORIFICE 68J7-Orifice Plate (2) 541 F445-1 (B_3) U2C Y Y!RC L'OOP A COLDI5L-EG-1T MANIFOLD ORIFICE Orifice Plate (2) .541F445.-.1(D8)L 66/U2C Y IY RC LOOP B COLD LEG RTD MANIFOLD ORIFICE P__- RO-0O487 dap-ifary -~ 541F441.2(F5)_ Y ,Y R RV HEAD VENT FLOW ORIFICE
.Y ;Y P8*2 RO-00488 541 F4 45-2 (G5) U2C/T-1 PZR CUB/UPPER LEVEL "T-1PZR VENT FLOW ORIFICE lY IY P-14A CONT SPRAY PUMP FLOW ORIFICE I,-
RO-00900A 110E& 5-3 (G5) 8/PAB Capi.ry (1) 11OE035-3 (cs) 8/PAB Y IY P-14A CONT SPRAY PUMP RECIRC ORIFICE Y ;Y P14B CONT SPRAY PUMP FLOW ORIFICE Pi2 R- Oi60509 11OEO35-3_6L) B/PAB ly ;Y P-14B CONT SPRAY PUMP RECIRC ORIFICE PB2 RO-00900D i01P2 RO-04003 Valve/Trini/Adj M-217-i GS)_ B/CCB!AFP RM 2P-29 CUB Y ,Y 2P-29 APP MINI RECIRC ORIFICE P-0 RO-03362A Orifice Plate M-227-1 (D10)___ 50/DGB/G-03 RADTR RM Y Y G-03 EDG HX-265A RADIATOR VENT ORIFICE Orif.c Plae" M-227-2 (HIe) 50/DGB/G-04 RADTR RM Y ,Y G-04 EDG HX-265B RADIATOR VENT ORIFICE PB0 R6O-03363A Orifice Plate
]m--2,-27-1 (H8)_ 50/DGB/G-03 RADTR RM Y 'Y G-03 EDG HX-266A LUBE OIL COOLER VENT ORIFICE Y "Y G-04"EDG HX-266B LUBE Oi[ COOLER VENT ORIFICE Orifice Plate SRO-03363B !50/DGB/G-04 RADTR RM IPB0 RO-03989A Orifice Plate 4M-219-3 (G5) 28/DGB/IG-03 DAY TK RM Y Y IT-176A G-03 EDG DAY TANK INLET ORIFICE
- R-O-03i9B9 WP60RO-04008 PBO- RO-04015 Valve/Trim Valve/Trif l IM.-217-1(E_)
M**29-3 (E5) 28/GB/G44 FOTP/DAY TK RM 8/CB/AFP RM P-38A CUB 81CBIAFP RM P-38B CUB Y ,Y T-1768 G-04 EDG DAY TANK INLET ORIFICE Y !Y" F8-8A AFP Ml-I"N RECIRC ORIFICE Y ;Y 1P-38B AFP MINI RECIRC ORIFICE
'P.~ RO-02909 Orifice Plate Orifice Plate M.207-4 (G 9) 26/PAB/CENTRAL Y :N ISW FROM HX-15A-D CONTVENT CLR MOV BYP ORIFICE PB2 RO-04105 Inline Orifice M-2207-2AB 7LG7 26/PABICENTRAL Y N ISW FROM HX-1 5A-D CONT VENT CLR MOV BYP ORIFICE Pib0 IRO-01005A IVinve/Orifice 684J972-1 (B6)_ 46/PAB/WG COMP RM Y 'N- K l-A WG COMP SEAL WATER MAKEUP INBOARD FLOW ORIFICE Inline Orifice 4r6_AB/dNG COMP RM Y N 'Kl-B WG COMP'SEAL WATER MAKEUP INBOARD FLOW ORIFICE PB0 IRO)-.ldOO6A iG). 461PABJ.1WG COMP RM Y 'N4 1KI-AWG COMP SEAL WATER MAKEUP FLOW ORIFICE
- 684J972-1
- 684.972-1 (BP) 46/PAB/VG COMP RM Y 'N K-11B WG COMP SEAL WATER MAKEUP FLOW ORIFICE PB0 'IO-01006B inline Orifice
.* t.F PBO RO-01009A Orifice Plate 0684,1972-1G6) 4_6/PABIWG COMP RM Y IN K-1A WG COMP SEAL WATER FLOW ORIFICE Orifice Plate 684J972:1 (B_6) YIN K-I WG COMP SEAL WATER FLOW ORIFICE rfic Plate ..684J972-.1_(G)_ 46/PABIWG COMP RM "Y N K-1A WG COMP SEAL WATER MAKEUP FLOW ORIFICE PBO RO-O0100B 46/PAB/WG COMP RM Y IN K-1B WG COMP SEAL WATER MAKEUP FLOW ORIFICE Orifice Plate I684J9721 (B66--.
PB0 RO-OIi04A 1684J972- (H6) 46*PABfWG COMP RM Y IN K-1A WG COMP NITROGEN MAKEUP FLOW ORIFICE 6rifice Plate 1684J972-1 (C6) 46/PAB/WG COMP RM Y IN K-1B WG COMP NITROGEN MAKEUP FLOW ORIFICE frBO RO-O1014B Orifice Plate PB0 RO-06306 M-209-3 (F8) 8ICB/AIR COMP RM Y 1`4 T-33B/C IA RECEIVER CROSSTIE ORIFICE PW U-nn-numib'ered 8/PAB/PIPEWAY #2 V JY 1P-iOARHRPumpRecirOrifice C api'!ry (1) 110EO18-1_ (138)
P1 Un-nmbred 8/PAB/PIPEWAY #2 VY Y 1P-IOB RHR Pump Recir Orifice PB1 Un-numbered Capillary (I) 110E029-1 (C8) 8/PABIPIPEWAY #3 Y Y 2P-10A RHR Pump Recir Orifice P52 Un-_numbe-r* 52ý0p-ry 0) 110E029-1 (B8 8/PAB/PIPEWAY #3 iY Y 2P-10B RHR Pump Recir Orifice PB2 Un-numbered Staged Orif (1) 110E017-2 (F8) 8/PAB/SI PUMP AREA W 1Y Y IP-15A HHSI Pump ReclrOrifice SFaged Orif (1) 1110E017-2 (E8) 8/PABISI PUMP AREA W :Y Y '1P-15BHHSI Pump Recir Orifice Staged Orif (1) Y Y !2P-15A HHSI Pump Recir Orifice 0B2 U-nV6umbered 8iPAB/SI PUMP AREA W SY '2P-15B H*SI Pump Recir Orifice
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PB1 MS-00279 M-201-3 (F5) 26/U1F N N *HX-18AI/2 SGBD HX OUT TO T-26 SGBD TANK IN THRTL PB2 MS-00279 Valve/Trim/AdI 1N N HX-18131/2 SGBD HX OUTL"ET TO T-26 SGBD TANK THRTL Valve/TiM/AI 26/U2F N N HX-18A1/2 SGBD HX OUT TO T-26 SGBD TANK IN THRTL P82- iS-0028... Qave/TrIm/Adj M-2013Fl_
M-220T 1-3 iN N :HX-18812 SGBD HX OUTLET TO T-26 SGBD TANK THRTL PB0 RO-SA-O01 Valv-e/Trimayjd] _ PBM-227(~ 46/PAB J R RADWAStE STEAM SUPPLY SOUND REDUCING ORIFICE IN P81 Z-275A TjaFed"Cap (1) 110E017-3 (F5). 1Y Y i1P-14A CS Pump Eductor 8/PAB Y Y- 1P-14B CS Pump Eductor PB1 Z-275B Tapered Cap (1) 8/PAB P62 Z-275A TapereA Cap (!) 11 OE6ý LF).. 8/PAB VY Y '2P-14A CS Pump Eductor Pa2 Z_-27B Tapered Cap (1) 1110E035-3 (C5) Y V ,2P-14B CS Pump Eductor
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