ML20212C886
| ML20212C886 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 01/30/1987 |
| From: | GULF STATES UTILITIES CO. |
| To: | |
| Shared Package | |
| ML20212C855 | List: |
| References | |
| NUDOCS 8703040020 | |
| Download: ML20212C886 (9) | |
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1 GULF STATES UTILITIES COttPANY RIVER BEND STATION-UNIT 1 STARTUP TEST REPORT (SUPPLEBEENT 2) 30 JANUARY 1987 I
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5 STARTUP TEST REPORT (SUPPLEMENT 2)
- 1. The River Bend Unit 1 Startup Test Program officially was concluded on June 16, 1986. This report contains an update on the status of test exceptions which were open as of the November 18, 1986 supplement to the Gulf States Utilities Company, River Bend Unit 1, Startup Test Report. Since the November 18th report, eight (8) test exceptions have been closed with two (2) test exceptions having been created due to ongoing retest. A total of thirteen (13) open test exceptions remains.
- 2. All open test exceptions are categorized as affecting level 2 criteria or lower. Any level I criteria failures referenced in the report were promptly downgraded to level 2 criteria as a result of appropriate engineering analysis and are considered level 2 criteria in this report. This is consistent with the treatment of all test criteria referenced in the initial Startup Test Report. All open test exceptions were evaluated and cleared for continued full power operation.
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e ST-1 Chemistry and Radiochemistry TE 13: HEPA pre-filter efficiency did not meet level 2 acceptance criteria. Existing radionuclide levels continues to be insufficient to adequately measure filter efficiency. Data will be submitted to GE for evaluation and disposition.
STATUS: Open TE 16: Insufficient radionuclide levels to determine off-gas pre- and post treatment monitor response versus release rate. Data will be sent to GE for analysis. This TE affects level 2 criteria.
STATUS: Open Note: These two level 2 test exceptions have been evaluated as not impacting safe, full power operation.
ST-13 Process Computer TE 12: Temperature calibration problems were discovered as a result of BOP testing. These problems are still in the process of being corrected. Testing will be completed upon corrective maintenance on RTD calibration problem.
This level 2 exception was evaluated as not impacting safe, full power operation.
STATUS: Open ST-22 Pressure Regulator TE 22: Pressure regulator failed level 2 criteria for l incremental regulation. GE has evaluated and determined l insufficient data was collected to determine i acceptability. This exception will require retest. This exception has been determined not to impact safe, full power operation.
STATUS: Open i
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ST-23A Water Level Setpoint, Manual Feedwater Flow Changes j TE 19: Awaiting results of feedwater study by GE to determine
- required modifications (if any) to conduct retest.
Retest is required due to flow transmitters being recalibrated. This level 2 exception was evaluated as not impacting safe, full power operation.
STATUS: Open ST-25C/D Main Steam Line Flow Instrumentation TE 3: The elbow tap flow versus delta P curves are not within
+5% of the design curves. The largest deviation is 32%.
General Electric has evaluated this data and agreed that this level 2 test exception does not impact full power operation. Work request have been generated to further investigate the problem during an outage condition.
STATUS: Open ST-29 Recirculation Flow Control TE 18: Duty cycle testing on Flow Control Valves "A" and "B" failed the icvel 2 criteria of 0.2% Hz during TC3 while I testing was not performed during TC6. Based on GE recommendations, a retest was performed during TC6. The results of the retest showed the values as meeting the required acceptance criteria (Max. duty cycle observed was .071%Hz). This disposition also satisfied the testing requirements of TC3.
STATUS: Closed s
ST-30C Recirculation System Performance TE 3: The Flow Control Valve mismatch that existed was reduced from 14% to 7% and the core and drive flow shortfalls
, have been resolved. GE and GSU evaluation is continuing on resolving the M ratio below design acceptance for Loop B problem. Retest will probably occur to satisfy the disposition of the M ratio problem due to the reduced Flow Control Valve mismatch. This level 2 test exception does not impact full power operation.
i STATUS: Open Page 5 of 10
l ST-74 Offgas System TE 12: Offgas System parameters outside level 2 limits. The Offgas System performance test parameters that had failed in the original test were retested on 12/15/86. Numerous items were again found outside the design values. This test exception was closed after TE-14 was written to identify the level 2 criteria failures identified during the retest.
STATUS: Closed TE 13: This TE was closed on 12/30/86 after the 'A' hydrogen analyzer was repaired. Retest data met all the required level 2 acceptance criteria.
STATUS: Closed TE 14: This TE was created as a result of the level 2 failures resulting from the retest of TE 12. The data frcm this retest has been submitted to GE for evaluation and disposition. This level 2 test exception does not impact full power operation.
STATUS: Open ST-95 Emergency Response Information System TE 3: Module SD-10 for performing scram timing failed. Work requests for correcting the problem has been generated.
This level 2 exception does not impact full power operation.
STATUS: Open ST-100 Piping Vibration TE 15: The ERIS Drywell Panel 107 was repaired and a retest performed on 12/10/86. Most of the vibration data met the required acceptance criteria, however, there were two exceptions to this (Level 2 criteria) which were documented on TE-22.
STATUS: Closed TE 16: Vibration data for MSS Points T42 and T220 was not available due to failure of ERIS data collection panel 113. Panel is scheduled for repair and points are to be retested. This level 2 test exception does not impact full power operation.
STATUS: Open Page 6 of 10
TE 19: During feedwater pump trip test (ST-23C), points T144X&Y failed level one criteria while T144Z failed level two criteria. In addition, there was no data available to test point T-35 due to failure of ERIS panel 107. A retest was performed on 12/10/86 for point T-35 with the test resulting in acceptable test data. Test points T144X and T144Y were downgraded to a level 2 criteria violation and was subsequently deemed acceptable by Stone
& Webster Engineering along with the data from point T144Z.
STATUS: Closed TE 20: During generator load rejection (ST-27) points MSS T-42Z, T-235X, Y, & Z, & FWS T-144X failed level 1 criteria.
MSS T-42X and FWS T-144Y and Z failed level 2 criteria.
No data was available for condensate test point T/S-525 since CNN-AOV 119 failed to open. The test data was reviewed and found acceptable for continued full power operation (downgraded to level 2) by S&W/NuPE. This test exception is open pending retest.
STATUS: Open TE 21: Test points MSS T-220, FWS T-39, SVV T-39, and T-85 were not operable during generator load rejection. This level 2 test exception remains open for retest and does not impact full power operation.
STATUS: Open TE 22: The data for the level 2 failures which resulted from the retest of TE-15 were submitted to Stone & Webster for evaluation. The data was deemed acceptable by S&W closing this test exception.
STATUS: Closed ST-101 BOP Piping Thermal Expansion TE 37: A retest was performed on 12/5/86 on test points E-56X (failed level 1) and on WCS snubber PSSP-3013-Al (failed level 2) . Retest data was found outside the required acceptance criteria which created TE39. This TE was closed.
STATUS: Closed Page 7 of 10
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! TE 39: Data from the retest of TE37 was submitted to Stone &
Webster for evaluation. Test point E-56X was reclassified as a level 2 criteria failure based on S&W recommendation and dispositioned as acceptable. Snubber PSSP-3013-Al was also dispositioned by S&W as acceptable.
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! Based on S&W recommendation, the test data for this snubber has been sent to engineering so that the item can i be monitored as part of the ISI Program.
STATUS: Closed l ST-104 ESF Area Cooling TE 2: Measured ESF room temperature in the HPCS, RCIC, RHR g A, RHR B, RHR C, exceed level 3 criteria of 90 F.
Evaluation still being performed by General Electric Engineering. This level 3 test exception does not impact full power operation.
STATUS: Open i
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SPECIAL ADDITION TO THE START-UP TEST REPORT:
LOOSE PARTS MONITORING SYSTEM In accordance with the recommendations of Regulatory Guide 1.133, this addition to the Start-Up Test Report is submitted to report recent permanent changes made to the Alert Level Getpoints of the Loose Parts Monitoring System. In addition, as recommended by Regulatory Guide 1.133, it will be repor ed that the recommended sensitivities of the Regulatory Guide for two channels of Loose Parts Monitoring could not be achieved due to specific in-plant conditions. These conditions and the sensitivities for these channels will be specified in this report.
During the Start-Up Test phase of operation, the Loose Parts Monitoring System (LPMS) exhibited a tendency to produce false alerts from several LPMS sensors. This was due to improper settings of these alert setpoints. Discussions with the LPMS vendor (Babcock and Wilcox) were subsequently held to determine methods for resolving this problem; which would include a visit by the vendor during the next planned outage. Until the planned outage, temporary alert setpoints were installed in the LPMS to eliminate false alerts as recommended by the vendor. The vendor was brought onsite in October, 1986 to provide assistance in eliminating the false alerts by determining actual LPMS background levels at various power levels and to assist GSU in establishing baseline sensitivities and alarm setpoints. This data made it possible to develop a correlation between the Regulatory Guide 1.133 recommendations of expressing sensitivities in units of ft-lbs to the vendor equipment alarm setpoints given in units of background noise.
According to Regulatory Guide 1.133; "The online sensitivity of the automatic detection system should be such that, as a minimum, the system can detect a metallic loose part that weighs from 0.25 lb (0.11 kg) to 30 lb (13.6 kg) and impacts with a Kinetic Energy of 0.5 ft-lbs (0.68 joules) on the inside surface of the reactor coolant pressure boundary within 3 feet (0.91 meter) of a sensor." With the exception of two LPMS channels, the sensitivity requirements of less than or equal to 0.5 ft-lbs was achieved.
The alert setpoints for LPMS are expressed in terms of the most
- conservative ration of RMS impact noise of an equivalent sensitivity of 0.5 ft-lbs to RMS background noise in the worst caso plant power. As stated earlier, the empirical relation between the Regulatory Guide 1.133 required alert setpoint of 0.5 l
i ft-lbs to the vendor produced alert setpoints in terms of a ratio
- of impact to background noise was developed in October, 1986 by the vendor. The use of a ratio as opposed to an absolute setpoint enables the LPMS to detect loose parts at more than one fixed background noise level in the most conservation condition.
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The new alert setpoints are given below and do meet the Regulatory Guide sensitivities of 0.25 lb to 30 lb impacts of 0.5 ft-fb with the exception of LPMS channef 5 (Feed Line Azimuth 225 ) and channel 7 (Steam Line Azimuth 252 ). Channel 5 and 7 were provided with alert setpoints as shown of 3:1 to prevent nuisance alarms during power operation. Test data by the vendor revealed that channels 5 and 7 do meet the Regulatory Guide required sensitivities with two of the three Test Hammer weights.
The failed sensitivity for channel 5 is with the 0.25 lb Test Hammer which now requires an impact energy of 1.4 ft-lbs to reach the alert setpoint which channel 7 requires 0.6 ft-lbs impact energy with the 30 lb Test Hammer to reach the alert setpoint under worst case power conditions. Adjustment of the alert setpoints and the failure to meet the Regulatory Guide 1.133 recommended sensitivities for channels 5 and 7 in no way affects continued safe full power operation.
CURRENT ALARM SETPOINTS LPMS CHANNEL ALARM RANGE MINIMUM SENSITIVITY 1: CRD 180 3.0:1-4.5:1 Less than 0.5 ft-lb 2: CRD 0 3.0:1-6.5:1 Less than 0.5 ft-lb 3: RCP 180 3.0:1-6.8:1 Less than 0.5 ft-lb 4: RCP 0 3.0:1-5.2:1 Less than 0.5 ft-lb 5: F WTR 225 3.0:1 1.4 ft-lb 6: F WTR 45 3.0:1-4.2:1 Less than 0.5 ft-lb 7: STM 252 3.0:1 0.6 ft-lb 8: STM 72 3.0:1-4.8:1 Less than 0.5 ft-lb i
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