ML20197A577
| ML20197A577 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 02/17/1998 |
| From: | NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20197A540 | List: |
| References | |
| NUDOCS 9803090294 | |
| Download: ML20197A577 (2) | |
Text
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s NUCLEAR HEGUL,JORY CCMMISSION WAamwoTow, o.c. aseewoM 3
i RAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RFl ATED TO AMENrwNT No.123 TO FACILITY OPERATING LICENSE No. NPF 11 AND i
AMENDMENT NO. -108 TO FACILITY OPEPATING LICENSE NO. NPF-18 COMMONWEALTH EDISON OOMoANY 4
LASAI I F COUNTY STATION. UNITS 1 AND 2 DQCr)<ET NOS. 50-373 AND 50-374 t
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1.0 INTRODUCTION
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By letter dated October 15,19g7, the CommonweaHh Edison Company (Comed, the licensee) submitted a request for changes to the LaSalle County Station, Units 1 and 2, Technical i
Specifications (TS). The proposed amendments would eliminate unnecessary detail from the Accident Monitoring Instrumentation Surveillance Requirements (TS Table 4.3.7.515 2.0 EVALUATION TS Table 4.3.7.51, Accident Monitoring Instrumentation Surveillance Requirements, lists the channel checks and channel calibrations for the required accident monitoring inatrumentation.
This table includes a quarterty channel calibration of the drywell hydrogen conoontration analyzer and monitor. A footnote (*) states that this calibration must be prformed using sample gas containing four voiume percent hydrogen with the balance nitrogen. The licensee has
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determined that the current TS is incoirect and proposes to delete this footnote.
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Three Mile Island (TMI) Action Plan item ll.F.1 provides the requirements for accident monitoring instrumentation, Attachment 6 to ll.F 1, "Conuinment Hydrogen Monitor
- states that the measurement capability of these monitors shall be prov td over the range of 0 to 10 percent hydrogen concentration. In LaSalle's licensing Safety Evaluation Report (SER),
NUREG-0519, Section 22, the staff concluded that the capability of the hydrogen monitors covers the 010 percent range and was, therefore, acceptable. The Updated Final Safety Analysis Repoit (UFSAR), Section 7.5.2.2.2.1, states that the hydrogen concent ation is recorded up to 10 percent. The use of a calibration pas containing four volume percent hydrogen, which is used to span the instrumentatiw, results in the control room indication for drywell hydrogen concentration being limited to a range of 0 percent to 4 percent. Therefore.
compliance with the current TS results in the instrumentation not meeting the licensing basi-The licensee has proposed to delete the footnote rather than modify it bated on the fact that it provides unnecessary detail concoming the calibration requirements that are specific to the type of instrument used for this application. These details are more appropriate for station procedures. The requirements to perform channel calibrations on a quarterfy basis and channel checks on a monthly basis will not be changed. The TS definition of Channel Calibration requires calibrating instrumentation channels over the range of use of the instrument. The 4
I 9803090294 990217 hDR ADOCK 05000373 PDR l-
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2 desig.1 and licensing basis requires a O percent to 10 percent indication range. Therefore, the licensee must use the appropriate calibration gas concentration to meet the T8 surveillance requirement, even if the specific details are not included in the TS 'ho level of detail proposed by the licensee is consistent with this and other Instrumentation lo ivREG 1434, Revision 1, Standard Technical Specificatiores, General Electric Plants, BW 14.
Because the footnote provides unnecessary detall, its deletion from the TS will not affect the requirement to perform channel calibrations of these instruments and is acceptable.
3.0 STATE CONSULTATION
in accordance with the Commission's regulations, the Illinois State official was notified of the proposed issuance of the amendments. The State official had no comments.
4.0 ENVIRONMENTAL CONSIDERATION
The amenciments change a surveillance requirement. The NRC staff has determined that the amendnerits involve no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite, and thet there is no significant increase in individual or cumulative occupational radiation exposure. The Commi::!on has previously issued a proposed finding that the amendments involve no significant hazartis consideration, and there has been no public comment on such finding (62 FR 61841). Accordingly. the amendments meet the eligibility criteria for categorical exclusion sat forth in 10 CFR 51.22(c)(g).
Pursuant to 10 CFR 51.22(b), no environmentalimpact statement or environmental assessment need be prepared in connection with the issuance of the amendments.
5.0 CONCLUSION
The Commission has concluded, based ori the considerations discussed above, that: (1) there is reasenable 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 la compliance with the Commission's regulations, and (3) the iss Jance of the amendments will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor: D. Skay Date: February 17, 1998