Power Reactor Event Number: 40981

 Facility: HOPE CREEK Region: 1 State: NJ Unit: [1] [ ] [ ] RX Type: [1] GE-4 NRC Notified By: C. BAUER HQ OPS Officer: JOHN MacKINNON

Notification Date: 08/24/2004 Notification Time: 16:48 [ET] Event Date: 08/24/2004 Event Time: 13:30 [EDT] Last Update Date: 08/24/2004

 Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE Person (Organization): EUGENE COBEY (R1) Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode 1 N Y 98 Power Operation 98 Power Operation

 Event Text NORTH PLANT VENT RADIATION MONITOR SKID TEST CONNECTION VALVE INADVERTENTLY LEFT OPEN.

 "On Tuesday 8/24/04 at 1330 hours, a test connection valve on the North Plant Vent radiation monitor skid was identified to have been inadvertently left open.

 This configuration issue appears to have occurred sometime on 8/19/04 following corrective maintenance on the North Plant Vent radiation monitor skid.

With this valve left open, the process flow path for the skid was effectively diluted as room air was drawn into the normal process flow from the North Plant Ventilation ductwork.

The physical location of the valve left open on the skid was such that the High/Low Noble Gas Range Monitors Iodine Sampler and Particulate Sampler would have been affected by this oversight.

Technical Specification section 3.3.7.5 for Accident Monitoring as well as Offsite Dose Calculation Manual section 3.3.7.11 would have been applicable for the condition described.

 The preplanned alternate method of monitoring (sampling) the parameters was not established.

This is in contrary to the requirements of Technical Specifications and the Off Site Dose manual.

This condition has been corrected and the North Plant Vent radiation monitor skid is currently operable.

Though alternate sampling capability was available, it was not recognized that it was required.

Should an accident have occurred during the time that the valve was open emergency assessment capability would have been compromised.

 This report is being made under Hope Creek Event Classification Guide RAL# 11.7.1.c in accordance with 10CFR50.72(b)(3)(xiii)." Local authorities will be notified of this by the licensee." The NRC Resident Inspector will be notified of this event by the licensee.