ML043340265
| ML043340265 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 11/19/2004 |
| From: | Danni Smith Arizona Public Service Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 192-01157-DMS/SAB/DGM/DLK 3-SR-2004-003 | |
| Download: ML043340265 (3) | |
Text
LAPS A subsidiary of Pinnacle lJ*st Capital Corporation ODCM 2.1 Palo Verde Nuclear Generating Station David M. Smith Plant Manager Nuclear Production Tel.
623-393-6116 Mail Station 7602 Fax.
623-393-6077 P.O. Box 52034 e-mail: DSMITH10@apsc.com Phoenix, AZ 85072-2034 192-011 57-DMS/SAB/DGM/DLK November 19, 2004 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 3 Docket No. STN 50-530 License No. NPF 74 Special Report 3-SR-2004-003 Attached please find Special Report 3-SR-2004-03 prepared and submitted pursuant to the PVNGS Offsite Dose Calculation Manual requirements. This report discusses the inoperability of the fuel building ventilation system high range radioactive gaseous effluent monitor for more than seventy-two (72) hours.
No commitments are being made to the NRC by this letter.
If you have questions regarding this submittal, please contact Daniel G. Marks, Section Leader, Regulatory Affairs, at (623) 393-6492.
Sincerely,
)VV DMS/SAB/DGMWDLK/kg Attachment cc:
B. S. Mallet, Region IV Administrator N. L. Salgado, Sr. Resident Inspector M. B. Fields, PVNGS Project Manager (all w/attachment)
A' 6 0 6iJ~
Attachment Special Report 3-SR-2004-003
Palo Verde Nuclear Generating Station Special Report 3-SR-2004-003 Fuel Building Ventilation System High Range Radioactive Gaseous Effluent Monitor Inoperable Docket No. STN 50-530 Initial Conditions:
At approximately 0756 MST on October 24, 2004, Palo Verde Unit 3 was in a refueling outage, with the core off-loaded to the spent fuel pool when the fuel building ventilation system high range radioactive gaseous effluent monitor (RU-146) was declared inoperable due to its 120-vac power supply (PNB-D26) being removed from service for planned maintenance.
This Special Report is being submitted pursuant to the ODCM requirement 2.1, ACTION 42(b) to prepare and submit a Special Report to the Commission within 30 days if the monitor is not restored within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The 72-hour period for returning the monitor to an OPERABLE status expired at 0756 MST on October 27, 2004 with the monitor not OPERABLE.
Actions Taken:
The Preplanned Alternate Sampling Program for RU-146 to monitor the fuel building ventilation system was initiated pursuant to the ODCM requirement 2.1, ACTION 42(a) on October 27, 2004 at approximately 0756 MST. On October 30, 2004 at approximately 1850 MST, RU-146 was declared OPERABLE following restoration of power and satisfactory performance of applicable channel checks.
Cause of the Inoperability:
There was no malfunction associated with the inoperability of RU-146. The cause for exceeding the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> allowed by ODCM 2.1, Action 42(b) was equipment problems encountered during planned maintenance on an inverter (PNB-N12) that provides power to PNB-D26. Several circuit boards in the inverter needed to be replaced, calibrated, and load tested. The cumulative effect of the maintenance performed on the inverter resulted in RU-146 being out of service for approximately 154 hours0.00178 days <br />0.0428 hours <br />2.546296e-4 weeks <br />5.8597e-5 months <br /> and 54 minutes.
Plans and Schedule for Restoring the Channels to OPERABLE Status:
On October 30, 2004 at-approximately 1850 MST, RU-146 was declared OPERABLE following restoration of power and satisfactory performance of applicable channel checks. The total elapsed time of the inoperability was 154 hours0.00178 days <br />0.0428 hours <br />2.546296e-4 weeks <br />5.8597e-5 months <br /> and 54 minutes.