ML20083D835
| ML20083D835 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 09/18/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20083D830 | List: |
| References | |
| NUDOCS 9110010280 | |
| Download: ML20083D835 (2) | |
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1.0 INTRODUCTION
By an application for amendment dated April 25, 1991, CPU Nuclear Corporation (the licensee) requested a revision of the Technical Specifications (TS) to Facility Operating License fio. DPR-16 for the Oyster Creek Muclear Generating Station.
The proposed change revises TS Table 4.15.2, items 2.a and 3.a and related notes to revise surveillance requirements of the newly installed Main Stack and Turbine Building Vent Monitoring Systems (Radioactive Effluent Monitoring Systems - RAGEMS).
The existing specifications apply to equipment that has been replaced with updated nonitoring equipment.
The licensee stated that the existing TS requirements are adequate, but that the proposed change more accurately reflects the requirements of the newly installed monitors.
2.0 EVALUAT10tl j
The channel functional test requirements for the Main Stack Monitoring and Turbine Building Vent Monitoring Systems are being revised to provide more accurate surveillance requirements for the new system.
These systems were installed to comply with NUREG 0737 requirements to provide a capability to detect and measure radioactive noble gas fission products of the plant gaseous effluent releases during and following an accident.
Because the operational features of the Main Stack Monitoring System are different than the previous system, the licensee has proposed a deletion of note "e" for items 2.a. and 3.a. (Table 4.15.2).
The "e" note requires confirmation of control room alarms when the stack monitor system controls are not set in the operate mode. The licensee stated that this note is no longer required for the new-Stack Monitoring System.
The new Main Stack noble gas monitor also contains vernier potentiometers to allow for periodic instrument adjustments. Protective switch covers are installed over the instrument racks with alarms that annunciate in the control room whenever the covers are opened.
The licensee proposed a new note "h" for Table 4.15.2, item 2, Main Stack Monitoring System (noble gas monitor) to replace the present note "e" reference.
The new note includes a provision to functional test the switch cover alarm.
Note "h" also includes requirements to confirm control room annunciation for 9110010200 910910 PDR ADOCK 05000219 p
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measured levels above the alarm setpoint or for -low cr +t rate / monitor failure.
This' note provides more appropriate functional test rev 'rements for the revised Main Stack Monitoring System.
This change is acceptable to the staff.
The. Radioactive Gaseous Effluent Monitoring System (noble gas monitor) for the Turbine Building Vents also provides a control room-trouble alarm when measured levels are above the measured setpoint or for low count rate / monitor failure.
The proposed change adds a new note "i" (Table 4.15.2) to include the above trouble alarms in the channel functional test requirements of this system.
This charce is-acceptable to the staff.
The alarm function for both systems will tontinue to be checked during each channel functional test.
The surveillance interval for the channel functional
-test is not being revised and continues to be performed quarterly for the Main Stack and Turbine Building Vent Monitoring Systems.
The changes proposed by the licensee for the Main Stack and Turbinc Building Vent Noble Gas Monitors provides for channel functional tests that are more representative of the newly installed monitor requirements. The proposed changes provide assurance of the operability of the Pain Stack and Turbine Building Vent radioactive noble gas monitors.
Based on our review the staff finds the proposed TS amendment to Table a.15.2 revising the functional test requirements of Items ?.a. (Main Stack) and Item 3.a. (Turbine Building Vent) to be acceptable.
3.0 STATE CONSULTATION
In accordance with the Commission's regulations, the New Jersey State officia'l was notified of the propost.d issuance of the amendment. The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
Pursuant to 10 CFR 51.21, 51.32 and 51.35, an environmental assessment and finding 18, 1991 (56 FR 47253) prepared and published in the Federal Register of no significant impact have been Accordingly, based upon the_ environmental on September assessment, we have determined that the issuance of-the-amendment will not have a: significant effect on the' quality of the human environment.
5.0 CONCLUSION
The Commission-bas concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that the health and safety of the
- public will not be endangered by operation in the proposed manner, (2)_ such
-activities will be conducted-in complience with the Commission's-regulations, and-(3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:-
C. Doutt Date:
September 18, 1991 i
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