05000387/LER-1984-001, Updated LER 84-001-01:on 840103,H2/O2 Analyzers in Containment Atmosphere Monitoring Sys Declared Inoperable Based on Vendor Info.Caused by Catalyst Inability to Withstand Iodine Concentrations

Updated LER 84-001-01:on 840103,H2/O2 Analyzers in Containment Atmosphere Monitoring Sys Declared Inoperable Based on Vendor Info.Caused by Catalyst Inability to Withstand Iodine Concentrations

ML20088A552
Person / Time
Site:	Susquehanna
Issue date:	04/09/1984
From:	Keiser H, Wilks B PENNSYLVANIA POWER & LIGHT CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
LER-84-001, LER-84-1, PLA-2175, NUDOCS 8404120203
Download: ML20088A552 (3)

LER-2084-001, Updated LER 84-001-01:on 840103,H2/O2 Analyzers in Containment Atmosphere Monitoring Sys Declared Inoperable Based on Vendor Info.Caused by Catalyst Inability to Withstand Iodine Concentrations

Event date:
Report date:
3872084001R00 - NRC Website

text

_ _ .

s s. m .a UC" Form 3eg U.S. NUCLEAR EEGULATOl%Y COMMIS$10N M AFROVED OMS NO. 3150-0104 LICENSEE EVENT REPORT (LER)

PACILITY NAast (1) DOCKET NUMSER (2) PAGE (5 Susquehanna Steam Electric Station o ls l 0 lo I o l 3l8 l7 1 lOFl 0l 2 VITLElet H2 02 Analyzer Catalyst Replacenent.

EVENT DATE (S) LER NUMBER (6) REPORT DATE (7) OTHER F ACILITIES INVOLVED 18)

MONTH DAY YEAR YEAR " MONTH DAY YEAR F A Ci t:Tv NAMES DOCKET NUMBERtSI Susquehanna, Unit 2 ol5l0l0lo1 38l8 1 8 4 0l1 0l 3 8l 4 0l0 l1 0l1 0l 4 0l9 8 l4 o,s,o,o,oi  ; i OPERATING THIS REPORT IS SUAMITTED PUR$UANT TO THE REQUIREMENTS OF 10 CFR {: (Check one or more of the fonowme) (Ill MOOE m 5 a402i.) a4 ,,, ,On.H2Hm 73.,1 m R 30.406(aH1HG 80.3sisHil X 50.73(sH2Het 73.71(el (103 Oi 010 30 40.i.Hiim .0.3.ieim .O n .H2Hul _ g,,Egs7g,ge;et,,

w 20.405(aH1Hieil 30.73(aH2Hil 50.73teH2HvielH A> 366A1 20.408teH1HM to.73(aH2itel) 60.73(eH2Hv6alHel 20.405kH1Hvi 30.73teH2Hm) 50.73teH2Hal LICENSEE CONTACT FOR TMis LER 112)

N,t.M E TELEPMONE NUMBER ARE A CQQE i 7l1 17 Si 4l21-l 31213l9 COMPLETE ONE LINE FOR EACH COMPONENT FAILURE DESCRIGED IN THIS REPORT (13)

CAUSE SYSTEM COMPONENT "#

TU E O NPR $ CAUSE SY STEM COMPONENT "k O' O PR B BIB l IA E t CISl0 3 N I i l l l 1 1 1 I I l l l I l I l l 1 l l SUPPLEMENT AL REPORT EXPECTED (tel MONTH DAY YEAR SUBur5$107

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] NO l l l ASSTR ACT ILin,49 to t400 meten i e , scoream'etely 99% sonFle spece typewertten toneel (161 j '1he H2 /02 analyzers in the Containment Atmosphere Monitoring System were declared in-i operable based on informtion supplied by the vendor (Comsip Inc.) . Unit 1 was I shutdown for a tie-in outage with Unit 2, which is under construction, when the con-dition was identified to the Plant Staff.

f Errors made by Comsip during the design of the catalysts resulted in the catalysts not being capable of withstanding the iodine concentration that would exist in the 4

contairment of a 3000 megawatt thermal reactor under the worst conditions. Comsip ll has subsequently developed a modified catalysts capable of operating under the worst case conditions.

I 11/02 2 analyzers in the Containment Atmosphere Monitoring system for Units 1 and 2 have been supplied with the newly modified catalysts. The time required to stabilize and calibrate the analyzers has increased frm 5 minutes to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, and 5 minutes

! to 45 minutes respectively. Neither change affects the safe operation of the Susque-Panna Nuclear Station. The applicable procedures have been modified to reflect the enanges in 11/02 2 analyzer stabilization and calibration times.

I Unit 1 was shutdown for the tie-in outage with Unit 2 when the mdification to the l analyzers was identified and performed. There were no adverse consequences to public l health and safety.

8404120203 840409 PDR ADOCK 05000387 S PDR

• System codes not available.

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h hac Form 3s4A U E NUCLEAR REGULATO]IY COMMISSION LICENSEE EVENT REPORT (LER) TEXT CONTINUATION 49eaovEo oms NO. siso-oio4 EXPIRES 8'31 SS FACILITY NAME lil DOCK E T NUMS E R (21 LER NUMBER 16l PAGE (3)

Susquehanna Steam Electric Station " ' "

" Na I'M*N Unit 1 o l5 lo j o lo l 3 j8 l7 8 l4 __

0l 0 l 1 -

0l1 0l2 or 0 l2 TEXT f# mswo voce e rooured, use emnonat N8C Fem JEEWar (17)

According to the vendor for the H2/02 analyzer catalyst, Comsip, Inc., errors were made in assumptions regarding iodine concentrations that would exist in the reactor

! containnent of a 3000 megawatt reactor under the worst case conditions during a Ioss

! of Coolant Accident (IOCA) . As a result, the design of the standard (original) catalyst would produce hydrogen readings lower than those that would actually exist in containnent at that time.

Subsequently, Consip, Inc., has developed a modified catalyst capable of operating in lj the H2 02 analyzers under the worst canditions. The modified catalysts have been pur-

+

chased from Consip and installed in the H /02 2 Containment Atmosphere bbnitoring System Analyzers for both Units 1 and 2. As a result of this modification, stabilization time

, has increased fran five (5) minutes to eight (8) lurs before the analyzers zero ad-l justment can be performed. The time required before the analyzers calibration can be

performed has increased frun five (5) minutes to fourty-five (45) minutes. Neither )

changes affect the safe operation of the Susquehanna steam Electric Station since pro-l cedures require one of the two H202 analyzers in the Containment Atmosphere hbnitoring

Systan at each Unit to be in the " Analyze" node durirg plant operation with the second

! in " Standby". 'Ihe applicable procedures have been modified to reflect the changes in i H2 /02 anal.yzer stabilization and calibration times.

Unit 1 was shutdown for the tie-in cutage with Unit 2 when the nodification to the analyzers was identified and performed. There were no adverse consequences to public health and safety.

gxj ,on -.

PPat Pennsylvania Power & Light Company Two North Ninth Street

• Allentown, PA 18101

• 215/770 5151

U.S. Nuclear Regulatory Ccmnission Document Control Desk Washington, DC 20555 SUSQUEHANNA STEAM ELECTRIC STATION l LICENSEE EVENT REPORT 84-001-01 ER 100450 FILE 841-23 PLA-2175

Attached is an updated Licensee Event Report

4-001-01. 'Ihis event was

- determined to be reportable per 10CE'R, Part 50.73(a) (2) (v), in that it was learned that the catalyst in the H2/02 analyzer for the Contairment 1 Atmosphere systcm may have difficulty resisting iodine poisoning during i

a Ioss of Coolant Accident (IOCA) . The H2 /02 catalysts have been replaced with modified catalysts capable of withstanding iodine poisoning.

i i

4 H.W. Keiser

Superintendent of Plant-Susquehanna

1 BLW/pjg cc

Dr. Thanas E. Murlef -

Regional Administrator, Region I U.S. Nuclear Regulatory Cm mission 631 Park Avenue-King of Prussia, PA 19406 Mr. R.H. Jacobs Senior Resident Inspector ,

U.S. Faclear Regulatory Camission P.O. Box'52 Shickshinny, PA 18655 3

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