ML20070M115
| ML20070M115 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/29/1982 |
| From: | Andognini G ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| Shared Package | |
| ML20070M109 | List: |
| References | |
| NOS-82-1205, NUDOCS 8301120290 | |
| Download: ML20070M115 (3) | |
Text
DESIGI"TED ORIGIliAL Certified By Obl,
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December 29, 1982 run',$"o'A%Ulo, Mr. Robert H. Engelken Office of Inspection and Enforcement Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210, Walnut Creek Plaza Walnut Creek, CA 94526
Subject:
Docket 50-528 CPRR-141 Palo Verde Nuclear Generating Station IE Inspection Report 82-30 IE Inspection Report 50-528/82-30 dated November 29, 1982, identified one item of non-compliance. We have reviewed the subject inspection report and are providing the attached response for the item.
Arizona Public Service is in full compliance with the item identified' and plans to take no further action other than specified in our attached response.
Sincerely, jfp C.
Andoguini, V.P.
Electric Operations GCA/je Director, Of fice of Nuclear Regulation cc:
Director, Office of Inspection and Enforcement NRC Resident Inspector - PVNGS NRC Project Manager File:
82-055-026 8301120290 830101 PDR ADOCK 05000528 g
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n ATTACHMENT ARIZONA PUBLIC SERVICE COMPANY RESPONSE TO IE' INSPECTION REPORT NO. 50-528/82-30 DOCKET NO. 50-528 CONSTRUCTION PERMIT NO. CPPR-141 ITEM Criterion V of Appendix B to CFR 50 states, in part, that, " Activities affecting quality shall be prescribed by documented instructions, procedures, or drawings, of a type appropriate to the circumstances and shall be accomplished in accord-ance with these instructions, procedures, or drawings..."
Arizona Public Service Procedure 74CH-9SC02, entitled " Secondary System Hydrostatic Test Chemistry Control," provides chemistry specifications for water if used in the steam generators, following the secondary side hydrostatic test.
Arizona Public Service Procedure sf-303 was used for placing generators in a dry layup condition using a slightly pressurized nitrogen atmosphere following s the secondary hydrostatic test.
Contrary to the above, on October 19, 1982, water that did not meet chemistry specifications was allowed to fill the No. 1 steam generator which was in a slightly pressurized dry layup condition. This action was unplanned and oc-cured as a result of the uncoordinated testing of a valve in the feedwater line which permitted flush water to enter the steam generator and steam lines.
This is a Level V Violation.
RESPONSE TO ITEM
- 1. Corrective Steps Which Have Been Taken and the Results Achieved The primary concern of this incident involved possible impact to the equip-ment.
The investigation into this incident identified four possible areas.
These areas were identified as:
- 1) Chemistry / Corrosion Impact; 2) Pressure /
Temperature Impact; 3) Steam Generator Instrumentation Impact; 4) Possible Over Stressing of the Main Steam Lines.
To prevent any chemistry / corrosion impact, a recovery program was initiated and consisted of repeated filling, circulation, and drain of the steam generator with hydrazine treated Grade A water while simultaneously monitoring the discharge water chemistry. Both a visual and fiber optic examination was com-pleted and the generator was determined to be clean internally. Finally, the generator was filled with nitrogen and placed in dry lay-up.
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.-C Combustion Engineering has' completed an analysis as.to the possible mechanical damage due to pressurizing at low pressure and has determined that no damage is-expected in any part of.the generator.
An evaluation was performed by the instrument and control group and no adverse effect on the steam generator instrumentation is expected.
In addition.to the Steam Generator fill,.both main steam lines up to the isolation valves were also filled ~with approximately 40,000 lbs.
of water. The lines and supports have been designed for this extra weight for hydro test purposes, and therefore no abnormal stressing of the line resulted.
'2. Corrective Steps Which Will Be Taken to Avoid Further Items of Noncompliance The investigation into the inadvertent fill of the Steam Generator-determined that the major cause of.the incident was due to improper training / indoctrination of contract personnel and improper use of the APS Valve Tagging Procedure.
Based on the findings resulting from the investigation, the following actions to prevent re-occurrence will be taken:
a.
A review of the Valve Tagging Procedures was conducted with the reduction of tagging and valve position errors as the goal. This included additional operator training on the technical aspects of valves and their operations.
s b.
The current requestor list-for the Tagging and Clearance Procedure has been deleted. The Tagging and Clearance Procedure was revised to require that any individual requiring a clearance must first be trained and then certified by the Shift Supervisors before being placed on the new requestor list.
- 3. Date When Full Compliance Will Be Achieved Full compliance was achieved on December 15, 1982.
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