ML17306B058

Part 21 Rept Advising That Preliminary Evaluation of Rosemount Part 21 Notification Determined That Change in Systematic Static Pressure Span for Pressure Differential Transmitters May Result in Increase in Indicated Power

ML17306B058
Person / Time
Site:	Palo Verde
Issue date:	10/08/1992
From:	Roehler ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Gould C NRC
References
REF-PT21-92 NUDOCS 9210210029
Download: ML17306B058 (2)

Text

zCCLr.ERATED DrsTRrsrJTrON DEMONSZ'RATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9210210029 DOC.DATE: 92/10/08 NOTARIZED: NO DOCKET I FACIL:~TN-5'D-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit,2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTHOR AFFILIATION AUTH. NAME ROEHLER RECIP.NAME

'rizona Public Service Co.

RECIPIENT AFFILIATION (formerly Arizona Nuclear Power GOULD,C. NRC -'No Detailed Affiliation Given

SUBJECT:

Part 21 rept advising that preliminary evaluation of -I Rosemount Part 21 notification determined that change in systematic static pressure span for pressure differential 0 transmitters may result in increase ih indicated power.

DISTRIBUTION CODE: IE28D COPIES RECEIVED:LTR 0 ENCL ( SIZE: / S TITLE: Licensee Event Report (LER) 6 Part 21 Rept Combination (50 Dkt) 05000528

/

NOTES:STANDARDIZED PLANT Standardized plant. 05000529 A Standardized plant; 05000530 RECIPIENT CO PIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 PD5 PD TRAMMELLFC 1 INTERNAL: ACNW ACRS AEOD/DOA AEOD/DSP/TPAB AEOD/ROAB/DSP DEDRO NRR/ADP/DRP14E4 NRR/ADSP DIR NRR/DET/ECMB 9H NRR/DET/EMEB 7E NRR/DET/ESGB 8D NRR/DLPQ/LHFB11 NRR/DLPQ/LPEB10 NRR/DOEA/OEABll NRR/DOEA/OGCBll NRR/DREP/PRAB10 NRR/DREP/PRPB11 NRR/DRIS/RSIB9A NRR/DRIS/RVIB9D NRR/DST 8E2 NRR/DST/SELB 8D NRR/DST/SICB8H3 NRR/DST/SPLB8D1 RR/J)5T SRXB 8E NSIC SILVERFE EG ILE 02 RES/DSIR/EIB RES DSR/HFB/HFS RGN 1 RGN 2 RGN 3 RGN 4 RGN 5 RGN5 FILE 01 EXTERNAL'G6tG STUART F V ~ A 4 INPO RECORD CTR.

L ST LOBBY WARD 1 NRC PDR NSIC MAYSFG 1 NS1C MURPHYFG A NUDOCS FULL TXT NOTE TO ALL R]DS RECIPI NTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK.

ROOM PI-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION.

LISTS FOR DOCUMENTS YOU DON'T NEED!

0 TOTAL NUMBER OF COPIES REQUIRED: LTTR + ENCL

POWER REACTS EVENT NUMBER: 24396 FACILITY PALO VERDE REGION 5 NOTZFICATZON DATE: 10/08/92 UNIT: fl}CE~

=

f2} [3} STATE: AZ NOTIFICATION TIME: 16:57 fET}

EVENT DATE 10/08/92 RX TYPE: [1} [2} CE, [3} CE llz45[MST}

KANT TIME =

NRC NOTIFZED BY: ROEHLER LAST UPDATE DATE: 10/08/92 H{} OPS OFFICER: CHAUNCEY GOULD NOTIFICATIONS EMERGENCY CLASS: NOT APPLICABLE 10 CFR SECTION: OLSON NLTR LICENSEE 24 HR REPORT UNIT SCRAM CODE RX CRIT INIT PWR INIT RX MODE CURR PWR CURR RX MODE 1 N Y 100 POWER OPERATION 99 POWER OPERATION

. 2 N Y 100 POWER OPERATION 99 POWER OPERATION 3 N N 0 REFUELING 0 REFUELING EV1WZ TEXT THE LICENSEE REPORTED A POTENTIAL VIOLAT1ON OF A LICENSE CONDITION.

ON 8/31/92 ROSEMOUNT INC SENT THE LICENSEE A PART 21 NOTIFICATION PROVIDING REVISED SYSTEMATIC STATIC PRESSURE SPAN EFFECT NUMBERS FOR THE MODEL 1152 DIFFERENTIAL AND HZGH LINE PRESSURE DIFFERENTIAL TRANSMITTERS.

THE LICENSEE'S ENGINEERING DEPARTMENT HAS COMPLETED A PRELIMINARY EVALUATION OF THIS CHANGE. THE PRELIMINARY EVALUATION DETERMINED THAT THIS CHANGE MAY RESULT IN AN APPROXIMATE 0.24 INCREASE IN INDICATED POWER AND MAY HAVE RESULTED IN ALL THREE UNITS EXCEEDING THE MAXIMUM POWER LEVEL ZN THE FACILITY OPERATING LICENSE. BASED ON THE PRELIMINARY EVALUATIONS UNITS 1 & 2 HAVE REDUCED POWER TO APPROXIMATELY 99.54. ZT HAS ALSO BEEN DETERMINED THAT THIS CONDITION IS NOT SAFETY SIGNIFICANT. THE SAFETY ANALYSIS ASSUMES 1024 POWER. THE 0.24 INCREASE DOES NOT INCREASE THE SENSITIVITY ABOVE 24.

BASED ON THE FINAL EVALUATION OF THE ROSEMOUNT PART 21, THE LICENSEE WILL SUBMIT AN LER FOR THIS EVENT OR RETRACT THE EVENT. THE RI WAS INFORMED.

9210210029 'F21008 PDR ADOCK 05000528 PDR