IR 05000295/1979016
| ML19209C567 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 09/04/1979 |
| From: | Kohler J, Spessard R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19209C558 | List: |
| References | |
| 50-295-79-16, 50-304-79-15, NUDOCS 7910160156 | |
| Download: ML19209C567 (7) | |
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U.S. NUCLEAR REGULATORY COMMICSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No.
50-295/79-16; 50-304/79-15 Docket No.
50-295; 50-304 License No.
Commonwealth Edison Company P. O. Box 767 Chicago, IL 60690 Facility Fame:
Zion Nuclear Power Station, Units 1 and 2 Inspection At:
Zion Site, Zion, IL
Inspection Conducted: July 1 - August 1, 1979 m]
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[4 g T c1 FM Inspector:
J. E. Koh er i\\
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Approved Ey:
R. L. Sp ard, Chief
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Reactor Projects Section 1 Inspection Summary
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Inspection on July 1-August 1, 1979 (Report No. 50-295/79-16; 50-304/79-15)
Areas Inspected: Routine resident inspection of plant operations, maintenance, non-routine events, Units 1 and 2 Reactor Physics Testing, and Licensee Event Reporting. The inspection involved 132 inspector-hours onsite by one NRC inspector.
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Results: Of the areas inspected, one item of noncompliance (infraction -
failure to follow a radiation protection procedure - Paragraph 15) was identified.
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DETAILS 1.
Persons Contacted N. Vandke, Plant Superintendent C. Schumann, Operating Assistant Superintendent
- L. Soth, Administration and Support Assistant Superintendent E. Murach, Maintenance Assistant Superintendent
- E. Fuerst, Unit 1 Operating Engineer
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- R. Ward, Unit 2 Operating Engineer J. Marianyi, Technical Staff Supervisor T. Parker, Assistant Technical Staff Superintendent J. Joosten, Primary Group Leader F. Pauli, Shift Engineer N. Loucas, Shift Engineer G. Armstrong, Shift Engineer D. Kaley, Nuclear Station Operator S. Cali, B man R. Smith, Security Engineer
- P. Leblond, Station Nuclear Engineer B. T'Neimi, Nuclear Engineer B. Dean, Nuclear Engineer L. Newcome, Nuclear Engineer
- P.
Kuhner, Quality Control
- Denotes those present at the exit interview.
2.
Review of Plant Operations During the month, the inspector made tours of the turbine building, the auxiliary building, the control room and the perimeter and the security areas. With regards to the plant, the tours involved valve line-up audits, review of LCO conditions, discussions with plant operating personnel, review of station logs, and review of overall plant cleanliness.
No' items of noncompliance were identified.
3.
Plant Maintenance The inspector reviewed maintenance activities during the month to determine whether work control procedures were in effect. The f-11owing is a list of maintenance activities involved in the review.
Maintenance on the:
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1B Diesel Generator Loop Flow Indication
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Steam Generator Level
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Inverter IA Overpower Delta T No items of noncompliance were identified.
4.
Congressional Testimony The inspector gave a written deposition to the President's Commission Involving Three Mile Island, Unit 2, on July 6-7, 1979,
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in Washington, D.C.
5.
Plant Security During the month, the inspector reviewed the station security.
This review involved witnessing pat down searches, badging, parcel and vehicle inspection. Results of medical and weapon qualifications were reviewed for selected guards. The inspector made tours of the interiot and exterior portions of the security area.
No items of noncompliance were identified.
6.
Reactor Physics Testing a.
Core Power Distribution Limits The inspector reviewed Unit 1 Flux maps taken at 99% power and Unit 2 Flux maps taken at approximately 87% power. These Flux maps were taken during the month of June and July, 1979. The inspector noted that the maximum allowable Fq(Z) peaking factor calculated was in accordance with Technical Specifications Section 3.2.2.
No items of noncompliance were identified.
b.
Moderator Temperature Coefficient Determination The inspector reviewed the results of the Unit 2 Physics testing performed prior to full power operations for Unit 2, Cycle 4.
The review was conducted in order to determine the value of the moderator temperature coefficient. The results of the tests, which the inspector reviewed, showed that the reactivity traces taken during heatup and cooldown were linear and yielded a negative moderator temperature coefficient.
No items of noncompliance were identified.
c.
Control Rod Worth Measurements
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The inspector reviewed the results of the tasts performed on Unit 2 following the March 1979 refueling ev. age in order to
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. . . determine the Control Rod Worth. The licensee's procedure
complied with NRR guidelines contained in Branch Technical Positions. Four Banks, Control Banks A, B, C and D were measured by the boron dilution method.
Of the four banks measured, one bank did not meet the acceptance criteria estab-lished of plus or minus 15% difference compared with the predicted worth as described in the Unit 2, Cycle 4 Westinghouse Core Design document. As requested by NRR Branch Technical Positions, an additional bank was measured. With the additional bank measurement, the sum of the measured reactivity when , compared to the predicted value stated in the Westinghouse document, was within 10% of the predicted value and was acceptable.
The inspector has no further questions regarding Control Rod Worth for Zion, Unit 2, Cycle 4.
No items of noncompliance were identified.
d.
Shutdown Margin As permitted by the NRR Branch Technical Position, Shutdown Margin calculations do not have to be performed by the licensee, if the measurement of Control Rod Worth is within plus or minus 10% of the predicted value in the Westinghouse Design Document.
When this occurs, shutdown margin may be assumed to be as stated in the Westinghouse Document.
The inspector determined that adequate shutdown margin existed as required by Technical Specification Figure 3.2-1 by examina-tion of the core design report and supplementary calculations performed by the licensee during Physics testing for Unit 2, Cycle 4.
The inspector has no further questions regarding this item.
No items of noacompliance were identified.
e.
Axial Flux Difference Calculations The inspector reviewed the Axial Flux Difference Calculations and the Delta I trending for Unit 1 and 2.
The inspector has no further questions regarding calculations of Axial Flux Difference.
No items of noncompliance were identified.
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Incore/Excore Calibration The inspector reviewed the procedure used to calibrate the excore instrumentation to insure that the instrumentation was _ capable of measuring the correct axial offset and quadrant \\\\41 54\\ _,_
. . power tilt. The inspector determined the calibration was . performed for Unit 2, Cycle 4, and has no further questions regarding the incore calibration procedure.
No items of noncompliance were identified.
g.
Review of Plant Operations after Refueling Unit 2, Cycle 4 The inspector reviewed the startup packages completed by the operations department prior to startup of Unit 2, Cycle 4.
~ These packages demonstrated that the areas of the plant system disturbed during the refueling outage were aligned according to approved procedures.
No items of noncompliance were identified.
7.
Skylat Dissent On July 11, 1979, at approximately 11:55 a.m., the inspector was ordered by NRC, Region III management to direct the plant management to take the following precautionary measures because of the Zion Stations close proximity to Skylab's projected reentry path.
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Place a Senior Operating Engineer in the Control Room.
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Be prepared for a loss of offsite power.
This action was taken by the NRC, based on information received for NASA. This order was given verbally by the Resident Inspector to Station Management, and it was later resinded following confir= tion from NASA that Skylab had landed.
8.
Licensee Event Reports Reviewed The following Licensee Event Reports were reviewed during this month and are considered closed out.
Unit 1 Unit 2 79-04 79-02 79-08 79-04 79-11 79-09 79-15 79-10 79-16 79-12 79-19 79-13 79-24 79-15 79-40 79-17 79-41 79-19 79-45 79-21 79-47 79-27 - 79-32 No items of noncompliance were identified.
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Corporate Meeting of July 19, 1979 - A management meeting was held at the Commonwealth Edison Corporate Office on July 19, 1979. The purpose of the meeting was to discuss the regulatory performance of the three Commonwealth Edison Nuclear Plant Stations since January 1979.
With respect to Zion, a favorable review was given. The station was recognized for a decrease in noncompliance.
~ Personnel errors, both reportable and nonreportable were discussed in relation to their effect on plant performance. The purpose of this discussion was to highlight the fact that causes of personnel error should receive special attention. The details of this meeting are documented in Inspection Reports No. 50-295/79-15 and No.
50-304/79-14.
No items of noncompliance were identified.
10.
Review of the Economic Generating Control (EGC) System The inspector reviewed the system installed in the Control Room which, when operational, would permit the load dispatcher to make remote power changes at the Zion Station. The Unit is still in startup testing mode. There is no present date to make to system operational, although further checkout is planned. The inspector has no further questions regarding this item at this time.
No items of noncompliance were identified.
11.
Unit 2 Reactor Trip of July 24, 1979 A Unit 2 Reactor Trip occured at 1900 on July 24, 1979, from approximately 90% power due to personnel error. The 2C feedwater pump had been taken out of service to repair the recirculation valve. Maintenance was completed, and the pump was cleared for se rvice.
In order to latch this pump, the governor valves must be run down. While performing the latching process, the shif t engineer inadvertently went to the 2B feedwater pump station which was operating and ran the governor valves to minimum. This caused a reactor trip due to the inadvertent shutting down of the 2B feedwater pump. The first out annunciator indicated the trip was due to low steam generator level. During the trip, rod bottom lights for one group of rods did not illuminate, and shift personnel emergency borated as required by procedures.
Investigation by the licensee revealed that the rod bottom lights had failed to illuminate due to a malfunction in the lighting circuit . I147 343-6-
, . and there was no safety significance. All other equipment performed ' as required. The inspector has no further questions regarding this item.
No items of noncompliance were identified.
12.
Radiation Protection On July 18, 1979, while making a tour of the Auxiliary Building, the inspector found two individuals working in a radiation area.
, The area was posted as requiring respiratory protection. However, neither individual was wearing a respirator. The inspector called this fact to the attention of the individuals and station management.
The individuals immediately left the area and reported to radiation protection management personnel.
The individuals involved were interviewed by Station Managemen,t and given retraining on the need for compliance with Station Radiation Protection Procedures. A PRO investigation is in progress.
At the management exit meeting, the inspector stated that the occurrence of these two individuals working in an airborne area without required respiratory protection was considered an item of noncompliance against T.S. 6.2.B for failure to adhere to Station Radiation Control Procedures.
Since corrective and preventative action has been taken, no reply to this noncompliance is necessary.
13.
RT Push Buttons Unresolved Items 79-13-01 and 79-12-01 regarding installation of modified RT Push Buttons for performance of PT-10A & B is considered closed. Modifications to the RT Push Buttons were installed on both units on July 25 1979.
14.
Management Exit The management exit was conducted on August 1,1979 with Mr. Soth and others of the Zion staff in which the results of the inspection were summarized. A brief discussion was held regarding the following items.
a.
Radiation Protection - noncompliance b.
EGC System and Status c.
Large mrem burden due to compliance with IE Bulletins concerning Anchor Bolt and Seismic Restraints.
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