Part 21 Report - 1997-500

LICENSEE: BALTIMORE GAS & ELEC CO. SITE: CALVERT CLIFFS 1 2 EN NUMBER:32621 DOCKET: 05000317 05000318 EVENT DATE: 06-06-97 RX TYPE: PWR PWR EVENT TIME: 00:00 VENDORS: CE CE NOTIFY DATE: 07-14-97 EMERGENCY CLASS: N/A REGION: 1 STATE: MD TIME: 14:11 OPS OFFICER: STEVE SANDIN 10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH UNIT SCRAM RX INIT INITIAL MODE CURR CURRENT MODE CODE CRIT PWR PWR 1 N Y 100 POWER OPERATION 100 POWER OPERATION 2 N Y 99 POWER OPERATION 99 POWER OPERATION THE LICENSEE IS MAKING A 10 CFR PART 21 NOTIFICATION. THE LICENSEE IDENTIFIED THAT THE RECENTLY INSTALLED MAIN STEAM HEADER RADIATION MONITORS, EXTENDED GAMMA SCINTILLATION DETECTORS SUPPLIED BY NUCLEAR RESEARCH CORPORATION, MODEL #MD-55E(V3), FAILED A CHECK SOURCE VERIFICATION UNDER NORMAL OPERATING CONDITIONS WITH AMBIENT TEMPERATURES BETWEEN 110�F AND 120�F. THE DESIGN SPECIFICATION REQUIRES OPERATION UP TO 170�F, WHICH IS WITHIN THE VENDOR SUPPLIED OPERATING RANGE OF -22�F TO 194�F. THE PROBLEM APPEARS TO BE RELATED TO THE TEMPERATURE COMPENSATION OF THE DETECTORS. THE DETECTORS WERE DECLARED INOPERABLE AND REMOVED FOR REPAIR AT THE VENDOR'S FACILITY. THIS PLACES BOTH UNITS IN TECHNICAL SPECIFICATION 3.3.3.1, ACTION STATEMENT (30), AND IN THE EMERGENCY RESPONSE PLAN IMPLEMENTATION PROCEDURES WHICH ALLOWS AN ALTERNATE METHOD OF MONITORING EFFLUENT NOBLE GAS IN THE RESPECTIVE MAIN STEAM HEADER. THE LICENSEE PLANS TO INFORM THE NRC RESIDENT INSPECTOR.

Page Last Reviewed/Updated Friday, January 31, 2020