ML20044H109
| ML20044H109 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 06/02/1993 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20044H108 | List: |
| References | |
| PROC-930602, NUDOCS 9306070405 | |
| Download: ML20044H109 (19) | |
Text
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t SECOND TEN YEAR INTERVAL PUMP AND VALVE INSERVICE TESTING PLAN FOR ZION NUCLEAR GENERATING STATION UNITS 1 & 2 101 Shiloh Blvd.
Zion, IL 60099 L
l e
COMMONHEALTH EDISON COMPANY P, O. Box 767 Chicago,.IL 60690 i
t ZCORRTS-133 1
9306070405 930602 PDR ADOCK 05000295 P
PDR i
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 INSERVICE TESTING PLAN REVISION St# NARY (Page 1 of 1)
General This revision summary will list the current page being revised, provide a description of the revision, and reference the page number of the previous revision (Revision I?/91) affected.
l Since no revision summary was included for the previous submittal of January 7, 1993, Revision 11/92, this summary will include reference to those pages revised, although only the changes applicable to Revision 4/93 are being submitted.
Revision bars are utilized throughout the document to indicate information that has been added, deleted or changed by the revision.
Revision 4/93 and 11/92 Previous Eage/Sftciton_ D.eSttintion_oLChanse.
Rethgeisl i
Cover page -Clarified interval & chgd pg # to i 1
111 Revisions 4/93 and 11/92 Summary 111 iv-vi Changed applicable revision numbers per page #
iv-vi 10 Added reference to PR-04, PR-11, PR-12 & Note 9 10 11 Added Note 9 for PP Revision 11/92 11 13 Added PR-11 & PR-12 to Pump Relief Request Index 13 Clarified reference to section of 10CFR50 16-24 PR-03 Revised pages to 3 from 9 - Revision 11/92 16-24 (Deleted text from pages 19-24) 25-26 PR-04 Revised scope to include RHR pumps 25-26 30-33 PR-09 Revised pages to 3 from 4 - Revision 11/92 30-33 (Deleted text from page 33) 34a-34d PR-11 Changed from "PR-10" - submitted 11/92 N/A 34e-34f PR-12 Added 4/93 N/A 35 Added PP-08 to Pump TAP Index & PP-02 withdrawn 35 38 PP-02 Withdrawn 4/93 38 PP-03 Revised for typo 40a-40c PP-08 Added 11/92 N/A 163 Alphabetized two valve numbers (OFCV-PV44,45) 163 174 VR-01 Revised - Revision 11/92 174 218-218a VR-33 Revised - Revision 11/92 218 ZCORRTS-133 111
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 INSERVICE TESTING PLAN REVISION TABLE (Page 1 of 3)
Eage_Humher Revision Eage Number Revision i
1 9/91 48 9/91 2
12/91 49 9/91 3
9/91 50 9/91 4
9/91 51 9/91 5
9/91 52 9/91 6
9/91 53 9/91 7
9/91 54 9/91 8
9/91 55 9/91 9
9/91 56 9/91 10 4/93 57.
9/91 11 4/93 58 9/91 12 9/91 59 9/91 13 4/93 60 9/91 14 9/91 61 9/91 3
15 9/91 62 9/91 16 11/92 63 9/91 17 11/92 64 9/91
?
18 11/92 65 9/91 19 11/92 66 9/91 20 11/92 67 9/91 21 11/92 68 9/91 22 11/92 69 9/91 23 11/92 70 9/91 24 11/92 71 9/91 25 4/93 72 9/91 26 4/93 73 9/91 27 9/91 74 9/91 28 9/91 75 9/91 29 9/91 76 9/91 30 11/92 77 9/91 31 11/92 78 9/91 32 11/92 79 9/91 33 11/92 80 9/91 34 9/91 81 9/91 34a-34d 4/93 82 9/91 34e-34f 4/93 83 9/91 35 4/93 84 9/91 36 9/91 85 9/91 37 9/91 86 9/91 38 4/93 87 9/91 39 9/91 88 9/91 40 9/91 89 9/91 40a-40c 11/92 90 9/91 41 9/91 91 9/91 42 9/91 92 9/91 43 9/91 93 9/91 44 9/91 94 9/91 45 9/91 95 9/91 46 9/91 96-9/91 47 9/91 97 9/91 ZCORRTS-133 iv
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 INSERVICE TESTING PLAN REVISION TABLE (Page 2 of 3)
Ease _Humber Revision Page Number Revision 98 9/91 148 9/91 99 9/91 149 9/91 100 9/91 150 9/91 101 9/91 151 9/91 102 9/91 152 9/91 103 9/91 153 9/91 104 9/91 154 9/91 105 9/91 155 9/91 106 9/91 156 9/91 107 9/91 157 9/91 108 9/91 158 9/91 109 9/91 159 9/91 110 9/91 160 9/91 111 9/91 161 9/91 112 9/91 162 9/91 113 9/91 163 4/93 114 9/91 164 9/91 115 9/91 165 9/91 116 9/91 166 9/91 117 9/91 167 9/91 118 9/91 168 9/91 119 9/91 169 9/91 120 9/91 170 9/91 121 9/91 171 9/91 122 9/91 172 9/91 123 9/91 173 12/91 124 9/91 174 11/92 125 9/91 175 9/91 126 9/91 176 9/91 127 9/91 177 9/91 128 9/91 178 9/91 129 9/91 179 9/91 130 9/91 180 9/91 131 9/91 181 9/91 132 9/91 182 9/91 133 9/91 183 9/91 134 9/91 184 9/91 135 9/91 185 9/91 136 9/91 186 9/91 137 9/91 187 9/91 138 9/91 188 9/91 139 9/91 189 9/91 140 9/91 190 9/91 141 9/91 191 9/91 142 9/91 192 9/91 143 9/91 193 9/91 144 9/91 194 9/91 145 9/91 195 9/91 146 9/91 196 9/91 1<7 9/91 197 9/91 ZCORRTS-133 v
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 INSERVICE TESTING PLAN REVISION TABLE (Page 3 of 3) l Eage_ Number Revision Page Number Revision
-l 198 9/91 247 9/91 1
199 9/91 248 9/91 l
200 9/91 249 9/91 201 9/91 250 9/91 202 9/91 251 9/91 203 9/91 252 9/91 204 9/91 253 9/91 205 9/91 254 9/91 206 9/91 255 9/91 207 9/91 256 9/91 208 9/91 257 9/91 209 9/91 258 9/91 210 9/91 259 9/91 211 9/91 260 9/91 212 9/91 261 9/91 213 9/91 262 9/91 214 12/91 263 9/91 215 12/91 264 9/91 216 12/91 265 9/91 217 9/91 266 9/91 i
218-218a 11/92 267 9/91
{
219 9/91 268 9/91 220 9/91 269 9/91 221 9/91 270 9/91 222 9/91 271 9/91 223 9/91 272 9/91 224 9/91 273 9/91 225 9/91 274 9/91 226 9/91 275 9/91 227 9/91 276 9/91 l
228 9/91 277 9/91 1
228a 12/91 278 9/91 229 9/91 279 9/91 230 9/91 280 12/91 1
231 9/91 232 9/91 233 9/91 234 9/91 235 9/91 236 9/91 I
237 9/91 238 9/91 239 9/91 240 9/91 241 9/91 242 9/91 243 9/91 244 9/91 245 9/91 246 9/91 ZCORRTS-133 vi
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN TABLE 3.1-1 (Page 1 of 2)
UNITS 1 AND 2 PUMP INSERVICE TESTING PLAN LISTING TEST PARAMETERS CODE INLET OUTLET DIFF FLOH BRG EUMP NVBAER CLA_S3 SP_EED PRESS ERESS ERESS fBT_E VLBR IEEE L1LBI EREQ N_QlES OCC003 3
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 OCC004 3
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 OCC005 3
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 OCC006 3
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 OCC007 3
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 1(2)CS001 2
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 1(2)C5002 2
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 1(2)CS003 2.
Yes Yes Yes Yes Yes PR-03,11 PR-04 Yes QTR 1,2,3,4,9 000003 NC N/A N/A Yes N/A Yes Yes N/A N/A QTR 5
000004 NC N/A N/A Yes N/A Yes Yes N/A N/A QTR 5
1(2)D0003 NC N/A N/A Yes N/A Yes Yes N/A N/A QTR 5
1(2)D0004 NC N/A N/A Yes N/A Yes Yes N/A N/A QTR 5
1(2)D0005 NC N/A N/A Yes N/A Yes Yes N/A N/A QTR 5
1(2)D0006 NC N/A N/A Yes N/A Yes Yes N/A N/A QTR 5
1(2)FH004 3
Yes Yes Yes Yes Yes PR-03 PR-10 Yes QTR 1,2,3,6,7,9 1(2)FH005 3
N/A Yes Yes Yes Yes PR-03 PR-10 Yes QTR 1,2,3,7,9 1(2)FH006 3
N/A Yes Yes Yes Yes PR-03 PR-10 Yes QTR 1,2,3,7,9 1(2)RH001 2
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,8,9 1(2)RH002 2
N/A Yes ~
Yes Yes
.Yes PR-03 PR-04 Yes QTR 1,2,3,8,9 1(2)SIOO3 2
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 1(2)SIOO4 2
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 1(2)SH001 3
N/A PP-07.
Yes Yes PR-02,12 PR-03 PR-04 Yes PR-02 1,2,9 1(2) SHOO 2 3
N/A PP-07 Yes Yes PR-02,12 PR-03 PR-04 Yes PR-02 1,2,9 1(2)SH003 3
N/A PP-07 Yes Yes PR-02,12 PR-03 PR-04 Yes PR-02 1,2,9 1(2)VC006 2
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 1(2)VC047 2
N/A Yes Yes Yes Yes PR-03 PR-04 Yes QTR 1,2,3,9 ZCORRTS-133 10
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PIAN TABLE 3.1-1 (Page 2 of 2)
UNITS 1 AND 2 PUMP INSERVICE TESTING PLAN LISTING EXPLANATION OF NOTES:
- 1. Relief Request PR-05, " Range Requirements for Electronic Digital Instruments", applies to this pump.
- 2. Technical Approach and Position PP-01, " Allowable Range Limits for Pump Hydraulic Parameters",
applies to this pump.
- 3. Technical Approach and Position PP-03, " Initial Suction Pressure for Running Pumps", applies to this pump.
- 4. This is a diesel driven pump.
- 5. Technical Approach and Position PP-05, " Diesel Generator Fuel Oil Transfer Pump (DG FOTP) Testing",
applies to this pump.
- 6. This is a turbine driven pump.
- 7. Relief Request PR-10 " Auxiliary Feedwater Pumps Bearing Temperature Measurements", applies to this pump.
- 8. Relief Request PR-09, " Instrument Range for Residual Heat Removal Pumps", applies to this pump.
- 9. Technical Approach and Position PP-08, " Pump Test Development Using Reference Values", applies to this pump.
ZCORRTS-133 11
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 INSERVICE TESTING PLAN 3.2 Pump Inservice Testing Plan Relief Requests Pursuant to 10CFR50.55a(f)(5), relief requests are included where specific l
requirements of the Code have been determined to be impractical. These relief requests have been referenced by Table 3.1-1, " Units 1 and 2 Pump Inservice Testing Plan Listing", as applicable.
An index of pump relief requests is provided in Table 3.2-1, " Pump Relief Request Index".
A Relief Request Status is given for each relief request which explains the approval status and any significant changes made for the current revision.
Table 3.2-1 PUMP RELIEF REQUEST INDEX Relief EggReit Suhlert PR-01 Hithdrawn 12/17/87 PR-02 Service Water Pumps Testing Frequency PR-03 Vibration Testing PR-04 Pump Bearing Temperature Measurement (non-Auxiliary Feedwater)
PR-05 Range Requirements for Electronic Digital Instruments i
PR-06 Hithdrawn 10/01/90 PR-07 Hithdrawn 12/17/87 PR-08 Withdrawn 12/17/87 PR-09 Instrument Range for Residual Heat Removal Pumps PR-10 Auxiliary Feedwater Pumps Bearing Temperature Measurements PR-ll Diesel Driven Containment Spray Pumps Vibration Limits l
PR-12 Service Water Pumps Post Maintenance Testing during Power Operation ZCORRTS-133 13
i Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN RELIEF REQUESTS RELIEF REQUEST NUMBER: PR-04 (Page 1 of 2)
EMMP NUMBER CODE CLASS P1.dD P&ID COORDINATE OCC003 3
M-66 E-7 OCC004 3
M-66 E-7 OCC005 3
M-66 E-6 0CC006 3
M-66 E-5 0CC007 3
M-66 E-5 1(2)CS001 2
M-44 (514)
B-8 (B-8) 1(2)CS002 2
M-44 (514)
D-8 (D-8) 1(2)CS003 2
M-44 (514)
E-8 (E-8) 1(2)RH001 2
M-62 (520)
B-6 (B-6) 1(2)RH002 2
M-62 (520)
D-6 (D-6) 1(2)SI003 2
M-64 (521)
E-6 (D-5) 1(2)SIOO4 2
M-64 (521)
F-6 (E-5) 1(2)SW001 3
M-32-1 C-5 (C-3) 1(2)SWC02 3
M-32-1 C-6 (C-2) 1(2)SWOO3 3
M-32-1 C-6 (C-2) 1(2)VC006 2
M-55 (518)
F-4 (F-8) 1(2)VC007 2
M-55 (518)
F-4 (F-8)
DESCRIEllRNLEUNCllGN This includes the following scope of pumps in the IST Program; Component Cooling (CC), Containment Spray (CS), Residual Heat Removal (RHR), Safety l
Injection (SI), Service Water (SW), and Charging (VC).
CQDf_RFfJIREMENI Measuring and recording bearing temperatures of pumps per IHP-3100, 3300 3500(b), 4310 and 6230 during one inservice test each year.
DASIS FOR RELIEF AND PROPOSED ALTERNATIVE These pumps were not designed to permit pump bearing temperature measurements.
They are not provided with permanent temperature detectors or thermal wells. A test was performed in which a thermocouple couple was attached to the outside of the bearing housing.
It was found that the temperatures obtained reflected the ambient temperature more than the actual bearing temperature. Therefore, gathering meaningful data on bearing temperatures is impractical.
Furthermore, bearing temperature measurement will not provide significant additional information regarding bearing condition than is already obtained through vibration monitoring. An increase in bearing temperature usually occurs when the baaring has already degraded to a point indicative of pump failure. Vibration data better detects developing problems before the degradation of pump and provides more concise information with respect to the pump and bearing condition.
ZCORRTS-133 25
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN RELIEF REQUESTS RELIEF REQUEST NUMBER: PR-04 (Page 2 of 2)
BASJS FOR RELIEF AND PROPOSED ALTERNATIVE (continued)
Vibration data can provide information as to the change in the balance of rotating parts, misalignment of bearings, worn bearings, changes in internal hydraulic forces and general pump integrity. Vibration tests are taken at least quarterly, whereas bearing temperature is only taken annually.
Therefore, vibration velocity measurements will be taken in lieu of bearing-temperatures to monitor for pump degradation.
This alternative will provide adequate assurance of continued operational readiness and should increase pump longevity by detecting possible problems at an earlier stage.
RELIEF RE00EST STATUS This relief request has been revised 4/93 to include RHR pumps.
This relief request was previously granted by Safety Evaluation, dated 6/4/91 for other IST pumps, s
I-4 ZCORRTS-133 26
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN RELIEF REQUESTS RELIEF REQUEST NUMBER: PR-11 (Page 1 of 4) l EUMf_HU@fB CODE CLASS 111D P&ID C00RDISAIE 1(2)CS003 2
M-44 (514)
E-8 (E-8)
DESCRIEIJON/ FUNCTION i
The Containment Spray (CS) pumps are diesel driven centrifugal pumps with an emergency power source.
The function of the CS pumps is to deliver a nominal 1.7 percent sodium hydroxide water solution to spray nozzles in the ceiling of the containment building during a high pressure event.
CODE PEOUIREMENI ASME Section XI Subarticle IWP-3210, Table IWP-3100-2, as modified by PR-03 (use of OMa-1988 Part 6 Table 3a), states vibration amplitude allowed ranges and IHP-3230 states corrective action based on Table IWP-3100-2 (and IWP-4510 addressed in Pump IST Plan Relief Request, PR-03).
RAELS FOR RELIEE If relief is granted as requested in PR-03 then this basis will be applicable in regards to Table 3a of OMa-1988 Part 6.
The diesel driven CS Pumps have an inherent higher normal vibration level as compared with other pumps by virtue of their having a reciprocating engine as a pump driver.
The reciprocating action of the engine creates vibration transients which are then induced into the pump.
These transients cause vibration levels which frequently place the component in the alert range.
The proposed revision of vibration allowable limits allows trending and observation of tha subject component, without unnecessarily declaring a component in the alert or action range.
This stance is reasonable in light of the fact that OMa-1988 Part 6, Table 3a assigns different values for positive displacement pumps than for centrifugal pumps.
Reciprocating (positive displacement) pumps are not required to have an absolute limit for vibration assigned.
The reasoning parallel may be easily drawn between pumps and drivers; specifically a reciprocating engine driver (with its reciprocating linear motion and the attendant power strokes) that would generate significantly more vibration than a motor or turbine driven pump.
1 ZCORRTS-133 34a i
Reulsion 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUNP INSERVICE TESTING PLAN RELIEF REQUESTS RELIEF REQUEST NUMBER: PR-11 (Page 2 of 4) l A detailed study of the vibration and maintenance history of this driver / pump combination has been performed, and no detrimental vibration characteristics have been observed in the pump.
Bearings, impeller, shaft and body have displayed no undesirable conditions which can be attributed to vibration.
In an effort to mitigate the effects of the diesel engine on the pumps, flexible couplings have been installed but observed vibration levels remain in excess of the alert range absolute value.
While observed vibration levels were reduced slightly, no significant improvement was noted.
During evaluation of frequency spectrum plots, the diesel engine displays certain component type-specific frequency characteristics.
These characteristics, also appearing in the pump spectrum plot, are unlike those generated by a motor-driven pump of this design.
The frequency plot can discriminate between discrete frequencies, so that engine-generated vibration will not mask the vibration characteristics generated by a degraded pump.
The high observed pump vibration levels display frequency characteristics identical to those observed on the diesel engine.
The engine supplier has indicated that the current engine vibration amplitudes are acceptable.
In addition, the engine shares a common rigid mounting base with the pump.
These engine frequency characteristics are attributable to installation-specific driver-induced vibration, and are not considered to be detrimental to proper component or system operation for the following reasons.
While high vibration is certainly a condition to be avoided in any installation, the recorded maintenance and vibration history of this component shows no indication of any induced adverse effects. The observed vibration predominant peak is at a frequency normally associated with misalignment.
But this vibration is not attributable to misalignment, since this component has been aligned satisfactorily as evidenced by maintenance records.
The possibility of temperature effects on alignment have been addressed.
The pump has proven to consistently operate at its normal vibration level independent of component temperature.
The other possible causative condition for this type of frequency characteristic is the pump's structural coupling with the diesel engine driver.
The frequency characteristics demonstrate that the engine is clearly inducing vibration into the pump.
~
ZCORRTS-133 34b
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN RELIEF REQUESTS
]
i RELIEF REQUEST NUMBER: PR-11 (Page 3 of 4) l Vibration levels of a constant amplitude are less detrimental to rotating j
equipment at lower frequencies than those at higher frequencies. Any vibration i
thus generated by the diesel engine would be considerably less detrimental to i
the pump than the high frequency of vibrations normally associated with pump rotating element degradation because of the naturally lower frequency of incidence of the engine vibration. Any incidences of unbalance, misalignment 1
or other detrimental conditions could be detected by spectral analysis and corrected.
A physical solution to high vibration was explored, that of physically i
splitting the pump / driver base to structurally isolate the pump from the driver. Aside from the physical challenge presented by this modification, significant mechanical and structural re-analyses would be necessitated.
These analyses would be prohibitively expensive without a corresponding increase in quality, safety or reliability.
ERDE01EQ_ALIERNAIIYE A rigorous preventive maintenance program is proposed whereby the flexible coupling rubber blocks would be removed, examined, compared to previous removals to detect significant changes, and replaced each refueling outage.
This particular item is proposed because the flexible coupling is the power transmission link between the diesel engine and the pump, and would generally be the first physical indication (exclusive of observed vibration levels) of any detrimental engine-induced vibration effects.
Zion Station recommends, for the reasons given in the basis above, that the alert and action range absolute values be deleted and the multipliers of Vr (Vr
- vibration reference value) which determine the allowable ranges be reduced to define reasonable allowable ranges (ie. Alert: >1.2 Vr to 1.5 Vr; Action: >1.5 Vr) for the diesel driven CS Pumps.
t I
ZCORRTS-133 34c
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN RELIEF REQUESTS RELIEF REQUEST NUMBER: PR-11 (Page 4 of 4) l Additionally, pump vibration spectrum plots would be recorded each time the required quarterly test is performed.
The resultant spectra would be compared to spectra previously obtained and a thorough analysis would be performed on deviations identified.
Thus, a realistic trending effort would be undertaken whereby minute changes to pump performance could be evaluated far in advance of any actual degradation.
This vibration trending methodology would provide confidence in equipment reliability and exceeds the requirements addressed by OMa-1988, Part 6 Section 5.2.d.
RELIEF _RE0VESLSIAIMS This relief request is being revised to PR-ll from PR-10 as previously submitted January 7, 1993 (Revision 11/92).
This relief was originally labelled PR-10 by mistake and subsequently re-labelled PR-il. Originally, this relief request was added as a result of the NRC Safety Evaluation (SE),
dated June 4, 1991. Revision 11/92 was submitted after review of the vibration program in response to Appendix B, Paragraphs #3 and #4, of the Technical Evaluation Report.
ZCORRTS-133 34d
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN RELIEF REQUESTS RELIEF REQUESf NUMBER: PR-i2 (Page 1 of 2)
EUMP NUMBER CODE CLASS E&lD P&ID COORDINATE 1(2)SW001 3
M-32-1 C-5 (C-3) 1(2)SW002 3
M-32-1 C-6 (C-2) 1(2)SH003 3
M-32-1 C-6 (C-2)
DESCRIPll0NLEURCIION The Service Hater pumps are vertical turbine pumps and are supplied with an emergency power source.
The function of the Service Water Pumps is to provide lake water for cooling for both safety-related and non-essential heat exchangers and equipment.
The pumps also provide a redundant supply of water to the suction of the auxiliary feedwater pumps.
CODE _REQUIRfJiERI IWP-3110, " Reference Values" IHP-3111. "Effect of Pump Replacement, Repair, and Routine Servicing on Reference Values" 4
IWP-3300, " Scope of Tests" BASISl0R3E11EE As stated in Zion's Pump Relief Request, PR-02, " Permanent flow instrumentation is installed on the common discharge headers for the Service Water (SH) pumps on both units.
Flow instrumentation could not be installed on the individual discharge lines because the plant design did not provide a.
sufficient length of straight pipe needed for accurate flow measurements.
In j
order to test the pumps individually, two of the SW pumps on the Unit being tested must be secured and the cross-tie valves between units must be closed."
Additionally, pressure switches located on the common unit supply headers will
]
auto start an idle pump if the header pressure drops below the setpoint. -The j
low pressure needed to cause an autostart occurs when both units are at power, i
crosstie valves closed, and only one pump supplying a unit. Auto start of the idle pump will then result in the flow from both pumps being monitored by the common flow instrument.
The auto start function is designed to maintain header pressure above the minimum design for service water during a Design Basis Event.
Individually flow testing the SW pumps during normal plant operation would jeopardize safety.
Per UFSAR Section 9.2.1, two SH pumps per Unit are required during normal plant operations to provide adequate _ cooling.
During normal plant operations, operating the system as required for inservice testing would violate the SH system design requirements described in the UFSAR and place the plant in an unsafe operating condition.
ZCORPTS-133 34e 1
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN RELIEF REQUESTS RELIEF REQUEST NUMBER: PR-12 (Page 2 of 2)
Zion proposes an alternative to the requirements in IHP-3111 IWP-3300, and IWP-3110.
During normal plant operation the alternative test would be performed without measurement of flow rate following maintenance where reference values may have been affected.
This alternative provides an acceptable method to test the SW pump / motor combination because for each unique flow and head point on the pump performance curve there is a corresponding brake horsepower.
ERQEOSED ALTERNATIVE The proposed alternative would only be necessary during power operation after a SH pnmp has been replaced, repaired, or serviced where reference value(s) may have been affected.
Zion considers this maintenance to be infrequent during power operation.
Therefore, this test methodology may be performed only on those special occasions.
When a pump has been serviced offsite, the OEM or equivalent test facility will test the pump.
Pump head, flow, and brake horsepower will be measured to establish a new combination pump and motor characteristic curve. As part of this test, data will be taken at the previous IST flow reference value. The corresponding head and brake horsepower will be considered the " previous" (IHP-3111) reference test quantities to be used with the first inservice test at Zion Station.
Following installation of a replaced, repaired, or serviced pump where reference values may have been affected, Zion will perform an inservice test at power.
Zion will use brake horsepower as a required test quantity.
Flow will be manipulated until the brake horsepower corresponding to the reference flow is achieved.
When stable, the pump head and vibration will be measured.
These values will be the new reference values for subsequent IST.
As required by IWP-3111, deviations between the previous and new set of reference values shall be identified.
Zion will compare the previous head and vibration reference values with the new values.
The previous flow rate will be reconfirmed by varying the system resistance to the corresponding brake horsepower value.
Verification that the new values represent acceptable pump operation shall be placed in the record of tests.
In addition, during the next inservice test, performed during a scheduled cold shutdown, Zion will perform this altcrnative testing described above. This test will be analyzed for satisfactory operation.
If satisfactory, Zion may
)
establish an additional set of reference values from a second test, as allowed by IWP-3112, where flow rate will be measured.
This will enable Zion to conduct subsequent IST in accordance with Subsection IHP at the frequency discussed in PR-02.
RELIEF _BEOUEST STATUS This is a new relief request, Revision 4/93, and will require NRC approval prior to implementation.
ZCORRTS-133 34f i
Revision 4/93 ZION NUCLEAR GENERATING STATI(O UNITS 1 & 2 PUMP INSERVICE TESTING PLAN TECHNICAL APPROACil AND POSITIONS i
3.3 Pump Inservice Testing Plan Technical Approach and Positions j
Where the requirements of the Code were not easily interpreted, Zion Station reviewed general licensing / regulatory requirements and industry practice to determine a practical method of implementing each Code requirement.
The technical approach and positions have been provided to clarify Zion Station's implementation of the Code.
The technical approach and positions have been referenced by. Table 3.1-1, " Units 1 and 2 Pump Inservice Testing Plan Listing", as applicable.
An index of pump technical approach and positions is provided in Table 3.3-1,
" Pump Technical Approach and Position Index".
A Position Status is given for each Technical Approach and Position which explains any significant changes made for the current revision.
Table 3.3-1 PUMP TECHNICAL APPROACH AND POSITION INDEX Technical Approach and.fosition Suhlert PP-01 Allowable Range Limits for Pump Hydraulic Parameters PP-02 Withdrawn 4/93 PP-03 Initial Suction Pressure for Running Pumps PP-04 Hithdrawn 9/91 PP-05 Diesel Generator Fuel Oil Transfer Pump Testing PP-06 Hithdrawn 9/91 PP-07 Inlet Pressure Measurements for Service Water Pumps PP-08 Pump Test Development Using Reference Values-l r
ZCORRTS-133 35
Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 PUMP INSERVICE TESTING PLAN TECHNICAL APPROACH AND POSITIONS POSITION N'JMBER: PP-02 NAS WITHDRAWN 4/93 POSITION NUMBER:
PP-03 EOSIl10B_UILE Initial Suction Pressure for Running Pumps ISSULDISCUSSLDE Table INP-3100-1 requires inlet pressure to be measured before pump start and during the test. Thiswouldrequiresecuringapumpthatisalreadyrunningl as required for normal operations.
POSITION It is the Station's position that any pump already running during normal operation need not be secured to determine the initial suction pressure of the pump before start per ASME Boiler and Pressure Vessel Code Section XI (IHP-3400(b)).
In this case, the suction pressure will only be taken while the pump is running.
EOSLIIDILSHIUS This position was revised for typographical error 4/93.
l r
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Revision 4/93 ZION NUCLEAR GENERATING STATION UNITS 1 & 2 VALVE INSERVICE TESTING PLAN TABLE 4.1-3 (Page 3 of 6)
VALVE TO P&ID CROSS REFERENCE LISTING (sorted by system / valve number)
VAhf_EUmber E&lD Valve Nunibar E&ID 1(2)
M50020 H-20 (500) 1(2)S0V-RC08 M-956 (959) 1(2)MOV-M50020 H-20 (500) 1(2)S0V-RC09 M-956 (959) 1(2)
MS0021 M-20 (500) 1(2)SOV-RC10 M-956 (959) 1(2)
MS0022 M-20 (500) 1(2)S0V-RC11 M-956 (959) 1(2)
M50023 M-20 (500) 1(2)PCV-RC455C M-53 (516) 1(2)
MS0024 M-20 (500) 1(2)PCV-RC456 M-53 (516) 1(2)
MS0025 M-20 (500) 1(2)LCV-RC459 M-54 (517) 1(2)
M50026 M-20 (500) 1(2)LCV-RC460 M-54 (517) 1(2)
M50027 M-20 (500) 1(2)MOV-RC8000A M-53 (516) 1(2)
MS0028 M-20 (500) 1(2)MOV-RC8000B M-53 (516) 1(2)
MS0029 M-20 (500) 1(2)
RC8010A M-53 (516) 1(2)
MS0030 M-20 (500) 1(2)
RC8010B M-53 (516) 1(2)
MS0031 M-20 (500) 1(2)
RC8010C M-53 (516) 1(2)
MS0032 M-20 (500) 1(2)A0V-RC8025 M-53 (516) 1(2)
MS0033 M-20 (500) 1(2)A0V-RC8026 M-53 (516) 1(2)
MS0392 M-20 (500) 1(2)A0V-RC8028 M-53 (516) 1(2)FCV-MS57 M-20 (500) 1(2)A0V-RC8029 M-53 (516) 1(2)fCV-MS82 M-20 (500) 1(2)A0V-RC8033 M-53 (516) 1(2)fCV-MS83 M-20 (500) 1(2)A0V-RC8034A M-52 (515) 1(2)fCV-MS84 M-20 (500) 1(2)A0V-RC8034B M-52 (515) 1(2)FCV-MS85 M-20 (500) 1(2)A0V-RC8034C M-53 (516) 0FCV-0V73 M-34 1(2)A0V-RC8034D M-53 (516) 0FCV-0V74 M-34 1(2)A0V-RC8035A M-52 (515) 1(2)
PR0029 M-70-1 1(2)A0V-RC8035B M-52 (515) 1(2)FCV-PR19A M-70-1 1(2)A0V-RC8035C M-53 (516) 1(2)FCV-PR19B M--70-1 1(2)A0V-RC8035D M-53 (516) 1(2)FCV-PR20A h-70-1 1(2)
RC8046 M-53 (516) 1(2)FCV-PR20B M-70-1 1(2)
RC8047 M-53 (516) 1(2)FCV-PR21A M-70-1 1(2)
RC8058A M-52 (515) 1(2)FCV-PR21B M-70-1 1(2)
RC8058B M-52 (515) 1(2)FCV-PR22A M-70-1 1(2)
RC8058C M-53 (516) 1(2)fCV-PR22B M-70-1 1(2)
RC8058D M-53 (516) 1(2)FCV-PR23A M-70-1 1(2)
RC8079 M-53 (516) 1(2)fCV-PR23B M-70-1 1(2)
RC8083A M-52 (515) 1(2)FCV-PR24A M-70-1 1(2)
RC8083B M-52 (515) 1(2)fCV-PR24B M-70-1 1(2)
RC8083C M-53 (516)-
1(2)S0V-PR25A M-70-2 1(2)
RC8083D M-53 (516) 1(2)S0V-PR25B M-70-2 1(2)MOV-RHFCV610 M-62 (520) 1(2)SOV-PR25C M-70-2 1(2)MOV-RHFCV611 M-62 (520) 1(2)S0V-PR25D M-70-2 1(2)
RH0257 M-62 (520) 1(2)S0V-PR26A H-70-2 1(2)
RH0258 M-62 (520) 1(2)S0V-PR26B M-70-2 1(2)MOV-RH8700A M-62 (520) 1(2)SOV-PR26C M-70-2 1(2)MOV-RH8700B M-62 (520) 1(2)S0V-PR26D M-70-2 1(2)MOV-RH8701 M-62 (520) 0FCV-PV44 M-34 1(2)MOV-RH8702 M-62 (520) 0FCV-PV45 M-34 1(2)MOV-RH8703 M-62 (520)
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