ML19317D989
| ML19317D989 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/13/1976 |
| From: | Parker W DUKE POWER CO. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19317D990 | List: |
| References | |
| NUDOCS 7912100664 | |
| Download: ML19317D989 (2) | |
Text
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50-269 v rol FILE NUMUFR NRC DISTRIBUTION FOn PART 50 DOCKET MATERI AL INCIDE:iT REPO:1T FROM:
DATE OF DOCUMEN)
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DUKE POWER COMPANY 5/13/76 MR. NORMAN C. MOSELEY CHARLOT1'E, NORTH CAROI T"A DATE RECEIVED MR. WILLIAM 0. PARKER, JR.
6/1/76
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ONE SIGNED OESCRIPTION ENCLOSU RE LTR. TRANS THE FOLLOWING: "
LICENSEE EVENT RPT. (R0 50-269/76-6) ON 4/14/76 CONCERIIING FAILURE OF REACTOR BUILDING ENGINEERED SAFEGUARDS ISOLATION VALVE.
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j Control rod groups are withdra.m in sequence beginning with Group 1. Groups 5, 6, and 7 are overlapped 25 percent. The normal position at power is for Groups 6 and 7 to be partially inserted. The quadrant power tilt limi:s set forrh in Specificacion 3.5.2.4 have been established with consideration of potential e.ffects of rod bowing and fuel densification to prevent,the linear heat rate peaking increase associated with a positive quadrant power til: during normal powe.? operation from exceeding 5.10% for Unit 1. The lisi:s shown in Specification 3.5.2.4 5.10% for Unit 2 5.10% for Unit 3 l are measuremetic system independent. The actual operating limits,' with the appropriate allowance for observability and instrumentation errors, for each system are defined in the station operating procedures. measuremen: The quadranc :11: and =* mi imbalance sanitoring in Specifica:1on 3.5.2.4 and 3.5.2.6, respectively, norna117 will be perfor=ed in :he process The two-hour frequency for monitoring chase quan:1:1es will computer. of service. provide adequa:e surveillnace when the cotputer is cu: Allowance is ptwided for wi:hdrawal 14 d:s and reae:or power imbalance limi:s to be (.cseded for a period of :wo hours without specifica:1on violation. Acceptable rod positions and ishalance nus; be achieved w1:hin the two-hour ci=a period or appropriate ac:1on such as a redue:1on of power caken. Opera:ing restriccions are included in Technical Specificacion 3.5.2.5d The xenon to prevent excessive powar peak %g by transient xenon. reactivity sust be beyond its final naximum or mininum peak and approaching 1:s equilibrium value at the power level cutoff, f Ru :.xEiCES_ 1 SAR, See:1on 3.2.2.1.2 ISAR, Sec fon 14.2.2.2 h, SUPPLEfEIT 9 43&W FITC. DEfSITICA !CN RI?CET 3AW-1409 (UNIT 1) 3AW-1396 (CII* 2) 3AW-14C0 (CIIT 3) 3.5-11 .; ;;l: /:1 41, 41 & 38
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