ML093240131

Special Report 2-SR-2009-001-00

ML093240131
Person / Time
Site:	Palo Verde
Issue date:	11/12/2009
From:	Mims D Arizona Public Service Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
102-06093-DCM/MLL/JR, ODCM 2.1
Download: ML093240131 (4)

Text

ODCM 2.1 A--

A subsidiary of Pinnacle West Capital Corporation Dwight C. Mims Mail Station 7605 Palo Verde Nuclear Vice President Tel. 623-393-5403 P.O. Box 52034 Generating Station Regulatory Affairs and Plant Improvement Fax 623-393-6077 Phoenix, Arizona 85072-2034 102-06093-DCM/MLLUJR November 12, 2009 ATTN: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 License No. NPF-51 Special Report 2-SR-2009-001-00 Attached please find Special Report 2-SR-2009-001 -00, which is prepared and submitted pursuant to PVNGS Offsite Dose Calculation Manual (ODCM) requirements. This report discusses the inoperability of a fuel building ventilation system high range radioactive gaseous effluent monitor for more than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

By copy of this letter and the attachment, this report is being provided to the NRC Region IV Administrator and the PVNGS Resident Inspector.

No commitments are being made to the NRC by this letter.

Should you need further information regarding this submittal, please contact Ray Buzard, Compliance Section Leader, at (623) 393-5317.

Z Sincerely DCM/REB/JR/gat

Enclosure:

Special Report 2-SR-2009-001-00, Fuel Building Ventilation System High Range Radioactive Gaseous Effluent Monitor Inoperable cc:

(with enclosure)

E. E. Collins Jr.

NRC Region IV Regional Administrator J. R. Hall NRC NRR Project Manager R. I. Treadway NRC Senior Resident Inspector for Palo Verde A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

• Comanche Peak - Diablo Canyon

• Palo Verde

• San Onofre

• South Texas

• Wolf Creek

Enclosure Special Report 2-SR-2009-001-00 Fuel Building Ventilation System High Range Radioactive Gaseous Effluent Monitor Inoperable

Palo Verde Nuclear Generating Station Special Report 2-SR-2009-001-00 Fuel Building Ventilation System High Range Radioactive Gaseous Effluent Monitor Inoperable Docket No. STN 50-529, Unit 2 Reporting Requirement:

The PVNGS Offsite Dose Calculation Manual (ODCM) includes operability requirements for radioactive gaseous effluent monitoring instrumentation in Section 2.1, "Requirements: Gaseous Monitors." Action 42 for Table 2-1, Item 5, "Fuel Building Ventilation System," specifies that when the number of OPERABLE High Range Monitors is less than required by the Minimum Channels OPERABLE requirement, and the required monitor is not restored to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, then the associated actions are to:

a)

Initiate the Preplanned Alternate Sampling Program to monitor the appropriate parameter(s) when it is needed.

b)

Prepare and submit a Special Report to the Commission within 30 days following the event outlining the action(s) taken, the cause of the inoperability, and the plans and schedule for restoring the system to OPERABLE status.

Initial Conditions:

At 0523 Mountain Standard Time (MST) on October 15, 2009, Unit 2 was in a refueling outage, with the core off-loaded to the spent fuel pool. The fuel building ventilation system high range radioactive gaseous effluent monitor (RU-146) was declared inoperable due to its 120 VAC Class 1 E power supply being removed from service for planned maintenance.

RU-146 was not restored to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> per ODCM Requirement 2.1, ACTION 42(b).

Actions Taken:

The Preplanned Alternate Sampling Program was initiated pursuant to the ODCM Requirement 2.1, ACTION 42(a) on October 18, 2009, at 0130 MST. On October 21, 2009, at 0911 MST, RU-1 46 was declared OPERABLE after restoration of power and completion of the channel check surveillance test.

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Palo Verde Nuclear Generating Station Special Report 2-SR-2009-001-00 Cause of the Inoperability:

There was no monitor 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 the performance of planned maintenance on the 120 VAC Class 1 E power supply to RU-146. The cumulative effect of the maintenance performed resulted in RU-146 being out of service for 148 hours0.00171 days <br />0.0411 hours <br />2.44709e-4 weeks <br />5.6314e-5 months <br /> and 28 minutes.

Plans and Schedule for Restoring the Channels to OPERABLE Status:

On October 21, 2009, at 0911 MST, RU-146 was declared OPERABLE after completion of the channel check surveillance test.

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