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On 10/28/07 at 2203 in Operational Conditi … On 10/28/07 at 2203 in Operational Condition 5, two of three Refuel Floor Exhaust Radiation Monitors actuated on HI-HI Radiation during the Moisture Separator lift for Reactor Pressure Vessel Reassembly. Reactor Building Ventilation was procedurally secured at the time of the actuation to minimize the potential for airborne contamination. The cause of the elevated radiation levels at the Refuel Floor Exhaust Radiation Monitors is currently attributed to the lifting of the Moisture Separator closer to the surface of the water to obtain an unobstructed underwater path to the Reactor Pressure Vessel. The resulting ESF signal yielded an automatic start of the 'A' and 'D' Station Service Water Pumps, the Filtration Recirculation and Ventilation System, and load-shed of non-1E breaker loads. All systems responded as expected. Systems and components actuated by the condition have been restored to a normal stand-by alignment as required. No other systems were affected and the plant is stable in Operational Condition 5.</br>The licensee will notify the NRC Resident Inspector. The licensee notified the Lower Alloways Creek Township.</br>* * * RETRACTION AT 1554 ON 11/13/2007 FROM MICHAEL REED TO MARK ABRAMOVITZ * * *</br>Follow up investigation has revealed that the initiation of the signals was the result of radiation levels outside of the Refuel Floor Exhaust duct, and not from the in-duct activity. This would not be considered the parameter satisfying the requirements for initiation of the safety function of the system. The actual plant condition that satisfies the requirements for initiation of the safety function of the system is to detect conditions and initiate protective actions due to a release of steam or radioactive material internal to the duct that could result in the release of fission products to the environment. As a result, this is not considered a 'valid actuation' and is being retracted. Also, upon review of the refuel floor camera system, the reason for the HI-HI actuation was that during the Moisture Separator lift, the Moisture Separator broke the surface of the water by approximately 24 inches. This caused the radiation monitors to alarm on radiation shine from the moisture separator rather than airborne activity in the exhaust duct.</br>This notification also provides telephone notification of an invalid actuation other than actuation of the reactor protection system instead of submitting a written LER</br>1. This is not considered an LER</br>2. This report is being made under 10 CFR 50.73(a)(2)(iv)(A).</br>3. The resulting ESF signal yielded an automatic start of the 'A' and 'D' Station Service Water Pumps, the Filtration, Recirculation and Ventilation System (FRVS), and load-shed of non-1E breaker loads: all systems responded as expected. This was a complete actuation. All required systems started and functioned successfully.</br>The licensee notified the NRC Resident Inspector.</br>Notified the R1DO (Holody).ent Inspector.
Notified the R1DO (Holody).
02:03:00, 29 October 2007 +
43,753 +
02:12:00, 29 October 2007 +
02:03:00, 29 October 2007 +
On 10/28/07 at 2203 in Operational Conditi … On 10/28/07 at 2203 in Operational Condition 5, two of three Refuel Floor Exhaust Radiation Monitors actuated on HI-HI Radiation during the Moisture Separator lift for Reactor Pressure Vessel Reassembly. Reactor Building Ventilation was procedurally secured at the time of the actuation to minimize the potential for airborne contamination. The cause of the elevated radiation levels at the Refuel Floor Exhaust Radiation Monitors is currently attributed to the lifting of the Moisture Separator closer to the surface of the water to obtain an unobstructed underwater path to the Reactor Pressure Vessel. The resulting ESF signal yielded an automatic start of the 'A' and 'D' Station Service Water Pumps, the Filtration Recirculation and Ventilation System, and load-shed of non-1E breaker loads. All systems responded as expected. Systems and components actuated by the condition have been restored to a normal stand-by alignment as required. No other systems were affected and the plant is stable in Operational Condition 5.</br>The licensee will notify the NRC Resident Inspector. The licensee notified the Lower Alloways Creek Township.</br>* * * RETRACTION AT 1554 ON 11/13/2007 FROM MICHAEL REED TO MARK ABRAMOVITZ * * *</br>Follow up investigation has revealed that the initiation of the signals was the result of radiation levels outside of the Refuel Floor Exhaust duct, and not from the in-duct activity. This would not be considered the parameter satisfying the requirements for initiation of the safety function of the system. The actual plant condition that satisfies the requirements for initiation of the safety function of the system is to detect conditions and initiate protective actions due to a release of steam or radioactive material internal to the duct that could result in the release of fission products to the environment. As a result, this is not considered a 'valid actuation' and is being retracted. Also, upon review of the refuel floor camera system, the reason for the HI-HI actuation was that during the Moisture Separator lift, the Moisture Separator broke the surface of the water by approximately 24 inches. This caused the radiation monitors to alarm on radiation shine from the moisture separator rather than airborne activity in the exhaust duct.</br>This notification also provides telephone notification of an invalid actuation other than actuation of the reactor protection system instead of submitting a written LER</br>1. This is not considered an LER</br>2. This report is being made under 10 CFR 50.73(a)(2)(iv)(A).</br>3. The resulting ESF signal yielded an automatic start of the 'A' and 'D' Station Service Water Pumps, the Filtration, Recirculation and Ventilation System (FRVS), and load-shed of non-1E breaker loads: all systems responded as expected. This was a complete actuation. All required systems started and functioned successfully.</br>The licensee notified the NRC Resident Inspector.</br>Notified the R1DO (Holody).ent Inspector.
Notified the R1DO (Holody).
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00:00:00, 13 November 2007 +
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