IR 05000373/1981043
| ML20039F021 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 12/29/1981 |
| From: | Jackiw I, Lanksbury R, Maura F, Ring M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20039F018 | List: |
| References | |
| 50-373-81-43, NUDOCS 8201110727 | |
| Download: ML20039F021 (7) | |
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U.S. NUCLEAR REGULATORY COMMISSION
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REGION III
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j Report No. 50-373/81-43
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Docket No. 50-373 License No. CPPR-99
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Licensee: Commonwealth Edison Company l
Post Office Box 767 i
Chicago, IL 60690
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l Facility Name:
LaSalle County Station, Unit 1 Inspection At:
LaSalle Site, Marseilles, IL
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Inspection Conducted: November 9, 10, 12, 13, 17-20 and December 1-4, 1981
R.W.)Lanksburyf f,7& '
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Inspectors:
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(November 13, 1981)
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Approved By:
I'. N. Jac Chief
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Test Prdgram,Section l
l Inspection Summary
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Inspection on November 9, 10, 12, 13, 17-20 and December 1-4, 1981 (Report i
N_o. 50-373/81-43)
'l Areas Inspected: Routine, uaannounced inspection to review test procedures and resnits and previous open items. The inspection involved 173 inspector-j hours onsite by three NRC inspectors including 28 inspector-hours onsite
during offshift s.
In addition, the inspection involved 21 inspector hours
of inspection effort at the regional office by two NRC inspectore.
Results: No apparent items of concompliance or deviations were identified.
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8201110727 820105
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s DETAILS 1.
Persons Contacted
- B. Stephenson, Project Manager
- R. Bishop, Assistant Superintendent
- W. Huntington, Assistant Technical Staff Supervisor
- R. Kyrouac, Operations QA Supervisor The inspectors also interviewed other licensee employees, including members of quality assurance, technical and operating staff.
- Denates those attending the exit interview of December 4,1981.
2.
Licensee Action on Previous Inspection Findings (Closed) Open Item (373/81-20-05): Diesel generators air receivers low pressure alarm set approximately 30 psi below the minimum pressure required to guarantee five normal starting cycles. The inspector verified that the licensee has lowered the minimum pressure at which the air compressors will start to 210 psig and has increased the set point at which the low pressure alarm annunciates to 200 psig. This action has reduced the differential between the compressor start and low pressure alarm set point to an acceptable 10 psi.
(Closed) Open Item (373/81-20-09): Time delay in energizing of ESF busses from diesel generators being caused by over-under voltage relay.
The inspector verified that the licensee processed FCR No. 70179 which removed 59X contacts from the diesel generator breaker closing permis-sive circuits thus eliminating approximately 2 seconds from the time required to energize ESF busses.
(0 pen) Open Item (373/81-20-15): Refurbishing air start motors at least every 50 starts. The inspector verified that Procedure LTS-800-10, " Diesel Generator Air Start Motor Surveillance" has been written requiring the cognizant Tech Staff Engineer to review the
" Diesel Generator Start Log" every 14 days. He must initiate a Work Request to have all four air start motor.s on a diesei replaced whenever either start subsystem experiences its 43rd start. A Diesel Generator Start Log to be kept by a control room SR0 hos been generated; however, no station procedure requiring that the log be kept existed at the time of this inspection. This item remains open until such requirement is generated.
(Closed) Open Item (373/81-07-05): CRD Pump 1A trip on low suction pressure. The inspector verified that the licensee installed instru-mentation snubbers (FCR 32347) and satisfactorily performed a full core scram on March 20, 1981, without losing the 1A pump due to low suction pressure.
In order to standardize the plant design, a snubber was also installed upstream of the suction pressure switch for pump 1B.
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(Closed) Open Items (373/80-49-02 and 04): Recalibration of flowmeters used for local leak rate tests and ILRT results, including the penalties of the unvented penetrations. The licensee has informed the NRC that new calculations have shown the peak accident pressure, Pa, to be 39.6 psig instead of 32.5 psig. The inspector stated that all local leak rate test results and the ILRT results performed at 32.5 psig are no longer valid and PT-PC-101 has to be repeated.
(Closed) Open Item (373/81-20-03): Diesel generator "0" five success-ful starts or, two air motors from minimum receiver pressure. The inspector verified that special tesL LST-81-57 was performed on diesel generator 0 on October 5,1981. The initial air receiver pressure for each air subsystem was 200 psig.
Subsystem A was capable of six starts, the last one at an initial pressure of 130 psig. The start time was 12.3 seconds. Subsystem B was capable of seven starts, the last one at an initial pressure of 121.5 psig. The start time was 11.7 seconds.
(Closed) Open Item (373/81-20-10):
Periodic verificatien of the integrity of blocking diodes in diesel generators starting circuits.
The inspector verified that electrical surveillance Procedure LES-DG-101, Revision 2, dated November 17, 1981 Attachment A requires checking the operation of blocking diodes and relays in the diesel generator starting circuits annually.
(Closed) Open Item (373/81-20-11):
Periodic replacement of crankcase pressure switches. The inspector verified that electrical surveillance Procedure LES-DG-101, Revision 2, dated November 12, 1981, Attachment B requires the replacement of the crankcase pressure switches in accord-ance with EMD MI-259.
(Closed) Noncompliance (373/81-20-19): Failure to identify in a non-conformance or deficiency report the installation of a diesel generator wattmeter with incorrect calibration units.
The inspector verified that the licensee took the corrective action stated in his letter (L. O. De1 George to J. G. Keppler) dated September 21, 1981.
(Closed) Open Item (373/81-28-26): Engineering evaluation of containment liner deformations. The licensee submitted by letter (C. Sargent to
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J. C. Keppler) dated November 10, 1981, the report concerning the con-tainment liner deformations. The report identifies and categorizes a total of 69 deformations and concludes that no further monitoring of the liner deformations is necessary. The report has been reviewed by Region III technical personnel and it has been determined that no additional information is required at this time.
(Closed) Noncompliance (373/81-20-4C):
Fire diesel pump day tanks smaller than called for in the FSAR. The inspector verified that Section 9.5.4.3 of the FSAR was revised (Amendment 57) to change the fire diesel pump day tank capacity from 750 to 500 gallons and that NRR has accepted the change.
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(Closed) Noncompliance (373/81-20-13B): Acceptance of criteria which allows amount of stored fuel in the diesel fire pumps day tanks to fall below the minimum requirements specified in the FSAR. The inspector verified that:
(1) Section 9.5.4.3 of the FSAR was revised (Amendment 57) to reduce the minimum number of hours of fire diesel pump operation from 35 to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and that the change was accepted by NRR.
(2) The licensee performed fuel consumption rate tests on each fire diesel pump while pumping at 2500 gpm rate.
The highest measured fuel consumption rate was 17.6 gph.
(3) The fuel storage day tanks low level alarms were increased to 18" which assures enough fuel is available for approximately nine hours of diesel fire pump operation at 2500 gpm output.
(0 pen) Open Item (373/81-20-08): Use of all valid starts and failures af ter completion of each diesel generator 23 successful start test to determine frequency of testing at OL. The licensee stated that based on communications with NRR, they are not required to take further action.
The inspector stated that IE:HQ and NRC Regional position is that following completion of the 23 successful start tests all subsequent starts must be counted or otherwise the validity of the 23 starts is questionable.
This item remains open pending further review by Region III and NRR.
(Open) Open Item (373/80-25-13): Determine changes in containment free air volume due to modifications, and their effect on Pac.
The inspector determined that the f ree air volume used in the latest calculations for Pac was the originally reported figure in the FSAR. The licensee will document whether the free air volume number used in the latest calcula-tions reflects all changes made inside containment.
(0 pen) Open Item (373/80-36-05): Preoperational test Procedure PT-AP-103, Emergency Power Redundancy does not meet all regulatory and FSAR requirements. The inspector reviewed Revision 1 to PT-AP.103 and determined that the revision still does not meet all the requirements stated in the FSAR and SEF.
The licensee will review and revise the procedure to ensure it conforms to Chapter 8 and Table 14.2-6 of the FSAR; that loads which auto start during loss of of fsite power, and which are energized during plant operation, will be energized prior to the tcst, allowed to trip and sequence as needed; and that the acceptance criteria in the SER is incorporated into the Special Test section.
(Closed) Open Item (373/81-00-40): Verify maximum steady state loads on battery chargers do not exceed continuous rating for any mode of plant operation. The inspectors verified that for the Division 1 and 2 125V battery chargers, the maximum steady state loads during re-fueling, cold shutdown, hot shutdown, hot standby, startup or power operations would be 78 and 52.8 amps, respectively.
In an accident mode (loss of AC power followed by successful diesel generator-4-
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operation) the maximum steady state loads would be 79 and 54.4 amps, respectively (at 1 minute after start or accident).
Since the con-tinuous ratings of the Division 1 and 2 125V battery chargers are
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200 and 75 amps, respectively, the maximum steady state loads do not exceed the battery chargers' continuous rating for any mode of plant operation. For the 250 volt battery charger, the maximum steady state loads during refueling, cold shutdown, hot shutdown, hot standby, startup or power operations was determined to be 27 amps.
Since the continuous rating for the 250V battery charger is 50 amps, 27 amps does not exceed the continuous rating.
In an accident mode, however, the maximum loads may exceed the battery charger's continuous rating until three hours after the accident per Tabic 8.3-11 of the FSAR. NRR (J. Knox) agreed (via telecon F. Maura /
J. Knox) that because of changing load conditions, steady state would not be reached until the three hours after accident point so that the maximum steady state loads for any mode of plant operation 6o not exceed the battery chargers continuous rating.
(0 pen) Open Item (373/81-28-01B): During this inspection period the inspector witnessed a special test of one of the reactor water level trip switches that was a concern and the bases for an item of noncom-pliance in the previous inspection report. The purpose of the test was to show to the inspector that the design of the switch was such as to preclude it being able to reset opposite the trip point. Upon completion of the test, the inspector was satisfied on this point.
The above does not negate the licensee's responsibility to provide an answer to the above noted item of noncompliance, or to evaluate any other features of the trip system that could allow the item of concern to occur during operation. This item will remain open pending receipt of the licensee's response to this item.
3.
Preoperational Test Results Review The inspector reviewed the results of ti.e following completed test procedures against the prescribed acceptance criteria.
In addition, the licensee's test evaluation was revicwed for adequacy.
These procedures were fcuad satisfactory unless otherwise noted.
SD-EH-101B, Turbine Supervisory Instruments System Demonstration.
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PT-PV-101, Confirmatory Vibration Tests and Inspections The inspector reviewed the results of the vibration testing against the FSAR acceptance criteria (Table 14.2-45, Table I-1)
and was able to confirm, through discussion with the test engineer, thao the measured vibrations appeared to meet the acceptance criteria with one exception. The vibrations measured with the jet pump diffiaer accelerometers did not appear to conform with the specified acceptance criteria.
Discussion with the test engineer did not provide additional information on why the data-5-
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had been accepted.
Ilowever, the inspector noted that G.E. had analyzed it and had stated that it was acceptable. This is considered an Open Item (373/81-43-01) pending further review by Region III technical inspectors.
Open Item (373/81-43-02) Unresolved deficiencies, PT-PV-101.
c.
PT-VL-101, Laboratory HVAC System Preoperational Test Tables 2.a and 2.b.
of the Sargent and Lundy letter of August 6, 1981, entered in the test evaluation, indicated that the counting room does not/will not conform to design. Though this letter is referenced in the test evaluation, this particular item was not discussed, and during the initial questioning by the inspector, the test engineer was not able to explain what actions, if any, were going to be taken to resolve it.
Subsequent conversations with the licensee revealed that upon completion of a system modifi-cation the system would be tested and balanced such that it would meet the required design criteria (positive pressure between the counting room and surrounding areas).
This is considered an item of noncompliance; however, since items of a similar nature (lack of adequate test results evaluation)
were identified in the last inspection report (373/81-28) and the corrective action to prevent recurrence had not been implemented at the time this test was completed, this item will be considered an Open Item (373/81-43-03) pending review of the testing and balancing results.
Open Item (373/81-43-04) Unresolved deficiencies, PT-VL-101.
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PT-FC-101, Fuel Pool Cooling System Preoperational Test Open Item (373/81-43-05) Unresolved deficiencies, PT-FC-101.
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SD-Eli-101A, Turbine Electrohydraulic Control System Demonstration The inspector reviewed the analysis of the stop valve and control valve closure times performed by G.E. (the licensee's analysir, indicated tiiey did not meet the acceptance criteria) and was unable to determine the basis for acceptance. This is considered an Unresolved Iteir (373/81-43-06) pending further review of the data and G.E.'s analysis by the inspector.
Open Item (373/81-43-07) Unresolved deficiencies SD-EH-101A.
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4.
Management Meeting Held in NRC RIII Office December 10, 1981
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Attendance CEC'o b
C. Reed l
B. Stephsenson L. De1 George B. Shelton
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R. Bishop C. Sargent
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NRC P
C. Norelius
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R. Spessard
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R. Knop C. Williams I. Jackiw
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R. Walker
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S. Shepley i.
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Meeting Summary
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l A meeting was held between Commonwealth Edison Company (CECO) and
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NRC Region III representatives to discuss the licensee's proposed
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responses to two Notices of Violation with significant findings
issued to LaSalle Station.
In addition, the subjects of preopera-tional testing status and NRC/ CECO management interfaces and
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perceptions were discussed.
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Unresolved Items
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Unresolved Items are matters about which more information is required
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in order to ascertain whether they are acceptable items, items of non-compliance, or deviations. Unresolved items disclosed during the inapection are discussed in Paragraph 3.e.
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Exit Intetview
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I The inspectors met with licensee representatives (denoted in Paragraph 1)
on December 4, 1981. The inspectors summarized the scope and findings of j
the inspection, i
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