IR 05000327/1979022
| ML19246B393 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 05/09/1979 |
| From: | Donat T, Martin R, Whitener H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19246B391 | List: |
| References | |
| 50-327-79-22, NUDOCS 7907130359 | |
| Download: ML19246B393 (4) | |
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Report No. 50-327/79-22 Licensee:
Tennessee Valley Authority 500A Chestnut Street Chattanooga, Tennessee 37401 Facility Name: Sequoyah Unit 1 Docket No. 50-327 License No. CPPR-72 Inspection at Sequoyah Site near Chattanooga, Tennessee
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(fi Inspector:
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L. Wite March 2r 30,1979)
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6, 1979 Date Signed Moda Approved by; y/ vyd, A
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lt. D. Martin, Iection tief, RONS Branch Date Signed
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SUMMARY Inspection on March 29-30 and April 6, 1979 Areas Inspected This routine unannounced inspection involved 24 inspector-hours onsite in the areas of thermal expansion testing during hot functional testing.
Results Of the one area inspected, no apparent items of noncompliance or deviations were identified.
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DETAILS 1.
Persons Contacted Licensee Employees
- C. Cantrell, Assistant Plant Superintendent
- W. Andrews, Plant QA Staf f Supervisor
- E. Condon, Preoperational Test Section Supervisor
- H. Lollar, Construction Engineering, Supervisor Mechanical Inspection
- H. Fischer, Construction Engineering, Supervisor Mechanical Engineering L. McCloud, Plant QA Staff Engineer R. Mooney, HFT Test Coordinator, Preoperational Test Section D. Hutsell, RCS Thermal Expansion Test Director, Preoperational Test Section L. Cliftin, Mechanical Engineer, Construction R. Wright, Mechanical Engineer, Construction C. Manning, Construction Engineer Associate
- Attended Exit Interview.
2.
Exit Interview The inspection scope and findings were summarized on March 30, 1979 with those persons indicated in Paragraph 1 above.
The inspector discussed his review of procedure W - 1.7, Reactor Coolant System Thermal Expansion, and noted that no procedure is written to cover the expansion of other ASME Section III class 1, 2 and 3 systems. The inspector advised the licensee that this matter would be reviewed with IE Region II management and discussed further with TVA.
Inspectors (H. Whitener and T. Donat) discussed the thermal expansion program with TVA by telephone on April 2 and T. Donat attended a meeting at the Sequoyah site April 6 to further discuss an adequate the rmal expansion program (See paragraph 6).
3.
Licensee Action on Previous Inspection Findings None reviewed.
4.
Unresolved Items None.
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5.
Review of Thermal Expansion Program a.
Procedure Review The inspector reviewed the thermal expansion procedure for the Reactor Coolant System, W - 1.7, and found that the procedure was generally adequate in that it requires inspection and measurement of the reactor coolant loops and principal components of the system at specified temperature plateaus during system heat up The and comparison of the measured values with predicted values.
acceptance criteria require that any measurements not within The predicted values will be reanalyzed by the piping designer.
inspector noted that retest of piping clearances for locations which are hot shimmed or for supports and restraints which are adjusted during the heat up was not specified. Licensee management reinspection would be performed agreed that remeasurement or during a subsequent heatup for any hot shimmed areas and for any hangers, supports, and restraints which require adjustment.
b.
Thermal Expansion - Other ASME Section III Class 1, 2 and 3 Systems (1) Main Steam System Procedure TVA - 23A specifies points to be measured and compared with predicted movement at 350, 450 and 540 degrees Fahrenheit. Areas of potential interference were identified in the procedure for insp?ction at each plateau. The inspector had no questions based on this preliminary review. A copy of the procedure was obtained for further review at the IE Region II office.
(2) Feedwater System Procedure TVA - 23B specifies the points to be measured at various power levels and potential points of interference to be inspected.
A copy of this procedure was obtained for review at IE Region II office.
(3) Engineering Safjguards and Other Safety Related Systems The inspector found that no procedure had been developed which addressed the inspection requirements for other ASME Section III Class 1, 2 and 3 and high energy lines. The staff position requires that thermal expansion and current system supports and restraint for these systeras be inspected to verify operability and design limits. This matter was identified for further IE review as open item (327/79-22-01).
For further information on this item refer to paragraph 6.
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Plant Tour
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The inspector toured the area to inspect installed supportr. and restraiatc.
Samples of hardware were inspected in systemt such as Upper Head Injection, Safety Injection, Pressurizer Discharge, Main Steam and Feedwater Systems.
Details of this inspection such as were discussed aith the licensee and included problems loose lock nuts, loose cotter pins, and lecking snubbers (snubbers had not received the final inspection at this time).
the exit interview, the licensee agreed to (1) correct the Atitems identified by the inspector, (2) perform spot checks on the plant systems to determine if loose lock nuts and fastners are a general problem, and (3) evaluate spot check results to determine appropriate corrective action.
This item is identified for inspector followup as open item (327/79-22-02).
6.
Meeting On Thermal Expansion Test inspector met with licensee representatives at the Sequoyah The site on April 6, 1979.
At this meeting the licensee's Engineering personnel described a proposed thermal expansion measurement Design program which included all ESF system piping inside containment.ind all piping systems whose fluid temperature exceeded 200 F. The program allowed for recording baseline measurements at 140 F prior to thefor heatup, making visual observations of the hangers, snubbers, etc.
binding at 250 F, 350 F, and 450 F, making expansion measurements at the plant's no load temperature of 547 F, and taking repeat baseline measuremcnts at 140 F after cooldown. The inspector examined sample sheets and marked up system piping drawings, and discussed how data the proposed program compared with the programs at other facilities.
would remain open until The inspector stated that the item (79-22-01)
he had an opportunity to review the final approved thermal expansion measurement test procedure.
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