05000325/LER-1993-001, :on 930121,determined That Containment Atmospheric Control Airborne Particulate & Gaseous Radioactivity Monitors Not Seismically Qualified.Suppl to Rept Will Be Submitted

:on 930121,determined That Containment Atmospheric Control Airborne Particulate & Gaseous Radioactivity Monitors Not Seismically Qualified.Suppl to Rept Will Be Submitted

ML20044B676
Person / Time
Site:	Brunswick
Issue date:	02/22/1993
From:	Jonathan Brown, Jones T CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BSEP-92-0029, BSEP-92-29, LER-93-001, LER-93-1, NUDOCS 9303010306
Download: ML20044B676 (2)

LER-1993-001, on 930121,determined That Containment Atmospheric Control Airborne Particulate & Gaseous Radioactivity Monitors Not Seismically Qualified.Suppl to Rept Will Be Submitted

Event date:
Report date:
3251993001R00 - NRC Website

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Carolina Power & Light Company IGL"%'732mm"mMr4%Jem j

Brunswick Nuclear Plant P. O. Box 10429 Southport, N.C.

28461-0429 February 22, 1993 FILE:

B09-13510C 10CFR50.73 SERIAL:

BSEP-92-0029 U.S.

Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.

C.

20555 r

BRUNSWICK STEAM ELECTRIC PLANT UNIT 1 DOCKET NO. 50-325 LICENSE NO. DRP-71 LICENSEE EVENT REPORT 1-93-001 Gentlemen In accordance with Title 10 of the Code of Federal Regulations, the enclosed Licensee Event Report is submitted. This report fulfills the requirek*at for a written report within thirty (30) days of a reportable occurrence and is submitted in accordar.ce with the format set forth in NUREG-1022, September 1983.

i Very truly yours, M.

Brown, Plant Manager - Unit 2 Brunswick Nuclear Project i

TMJ/

I Enclosure cc:

Mr.

S. D. Ebneter Mr.

P. D. Milano BNP NRC Resident Office 1

og nn 930301030kO p,25 03 7

PDR ADOC PDR

~7 s

l j

1

I gRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED OMB NO. 3150-0104 to/92)

EXPIRES: 5/31/95 ESTIMATED SURDEN PER RESPONSE TO COMPLY WITH THIS INFORMAThDN COLEECTION REQUEST: 50.0 HRS.

FORWARD UCENSEE EVENT REPORT (LER)

COMMENu rec.No.URDEN EST,Mm TO Tm,uFORM AT,0N AND RECORDS MANAGEMENT $ RANCH lMNElB 7714). U.S. NUCLEAR REGULATORY COMMISSION. WASHINGTON, DC 20056-DOO1. AND TO THE PAPERWORK REDUCTION PROJECT (31LO4104), OFFICE OF MANAGEMENT AND BUDGET, WASHINGTON. DC 20503.

F ACILITY NAME (1)

DOCKET NUMBER (21 FAGE 13)

Brunswick Steam Electric Plant, Unit 1 05000325 1

TITLE Ms CONTAINMENT ATMOSPHERIC CONTROL (CAC) RADIATION MONITORS NOT SEISMICALLY QUALIFIED EVENT DATE (5)

LER NUMBER (6)

REPORT DATE (7)

OTHER FACILITIES INVOLVED (8)

MONTH DAY YEAR YEAR MONTH DAY YEAR N UMB ER NUMBER BSEP U-2 05000324 01 21 93 93

- 001 -

00 02 22 93 F ACluTY NAME DOCKET MBER 05000 THIS REPORT IS SUSMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR 1:(Check orie or more of the following)(11)

OPE RATING 4

MODE (9) 20.402(td 20.405(c) l 5033(aH2Hiv) 73J1 M 4 a 36(cHU W3(aH2M 73 W c)

POWER 000 LEVEL (10)

,g,gg{,H, Ui;,

gg 3g,cH,,

gg 73(,g,gw;;,

g7g[g 20.4051aH1Hiii)

X 50.73(a)(2Hi) 5033(aH2HviiiHA)

(Specify in Abstract 20.405(aH1Hiv) boJ3taH2Hii) 5033(aH2HviiiHB) 20.405(aH1)M 5033(aH2Hiii) 50331sH2Hm!

UCENSEE CONTACT FOR THis LER (12)

NAME TELEPHONE NUMBER Theresa M. Jones, Regulatory Compliance Specialist (919) 457-2039 COMPLETE ONE UNE FOR EACH COMPONENT FAILURE DESCRIBED IN THIS REPORT (13)

^

CAUSE

SYST[M COMPONENT M ANUF ACT URER

CAUSE

SYSTEM COMPONENT M ANUF ACTURE R D

I MONN DAY WAR SUPPLEMENTAL REPORT EXPECTED (14)

EXPECTED SUBMISSION YES NO 07 30 93 X

DATE (15)

1. f yes, compete LAPECTED SUBMISSION CATE)

ABSTRACT fumrt to 1400 spaces. 3 e approximately fifteen single space typewntten lines) (16s The units were shutdown in day 275 of a dual unit outage.

Brunswick Nuclear Plant (BNP) is committed to Regulatory Guide (RG) 1.45, Reactor Coolant Pressure Boundary (RCPB) Leakage Detection Systems.

RG 1.45 describes acceptable methCds of implementing General Design Criterion (GDC) 30, Quality of Reactor Coolant Pressure Boundary. GDC 30 requires that means be provided for detecting and identifying the location of the source of RCPB leakage.

RG 1.45 requires at least three separate detection methods, two of which are to be sump level / flow monitoring and airborne particulate radioactivity monitoring. The third method is monitoring of airborne gaseous radioactivity. The RG further states the leakage detection systems should be capable of performing their functions following seismic events that do not require plant shutdown and the particulate monitoring system should remain functional when subjected to the safe shutdown earthquake (SSE)

(i.e., design basis earthquake). On January 21, 1993, it was determined the containment atmospheric control (CAC) airborne particulate and gaseous radioactivity monitors were not seismically qualified. The CAC equipment modifications required to conform to the RG will be implemented prior to startup.

The sump system is also being evaluated to determine if it is in conformance with the RG; if equipment modifications to the sump system are required they will be implemented prior to startup. The safety significance of this event is minimal.

The loss of this equipment during a seismic event would not have prevented safe shutdown of the units and other methods such as containment temperature and pressure were available to detect RCPB leakage. A supplement to this report will be submitted.