ML20141H017
| ML20141H017 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 05/15/1997 |
| From: | Katz P BALTIMORE GAS & ELECTRIC CO. |
| To: | Miller H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| NUDOCS 9705230140 | |
| Download: ML20141H017 (2) | |
Text
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,r PETER E. KATE Baltimore Gas and Electric Company Plant General Manager Calven Cliffs Nuclear Power Plant Calven Cliffs Nuclear Pc,wer Plant 1650 Calven Cliffs Parkway Lusby, Maryland 20657 410 495-4101 May 15,1997 U. S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 ATTENTION:
Mr. H. J. Miller, Regional Administrator
SUBJECT:
Calvert Cliffs Nuclear Power Plant Unit No.1; Docket Nos. 50-317 Containment Hich Rance Radiation Monitors -- Soecial Reoort The attached Special Report is submitted in accordance with Calvert Cliffs Unit 1 Technical Specification 3.3.3.1.
This report concerns the inoperability of Unit 1 Containment High Range Radiation Monitors for a period in excess of seven days.
Should you have questions regarding this matter, we will be pleased to discuss them with you.
Very truly >ours, PEK/RCG/bjd Attachment ec:
Document Control Desk, NRC Director, Project Directorate I-1, NRC R. S. Fleishman, Esquire Resident Inspector, NRC yj J. E. Silberg, Esquire R.1. McLean, DNR V
A. W. Dromerick, NRC J. H. Walter, PSC 9705230140 970515 f
PDR ADOCK 05000317 I
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ATTACHMENT (1)
UNIT 1 CONTAINMENT HIGH RANGE RADIATION MONITORS - SPECIAL REPORT Baltimore Gas and Electric Company submits this Special Report concerning the inoperable Unit 1 Containment High Range Radiation Monitors as required by Technical Specification 3.3.3.1, Table 3.3-6, Item 1.b.
ACTION TAKEN The Unit 1 Containment High Range Radiation Monitors were removed from OPERABLE status on April 25,1997 at approximately 0940 to support the installation of new Main Steam Header Radiation Monitors per an approved modification. The installation of the new Main Steam Header Radiation l
Monitors, which will enhance our ability to detect a steam generator tube leak, required extensive modification work to be performed on the control panel which houses the Containment High Range Radiation Monitors. The required modifications were not able to be completed within the seven day action statement. All control panel modifications rendering the Unit 1 Containment High Range Radiation Monitors not OPERABLE were subsequently completed on May 3,1997. Tite Unit 1 Containment High Range Radiation Monitors were returned to OPERABLE status at approximately 1520, on May 3,1997.
EFFECT ON OPERATION Unit i Technical Specification 3.3.3.1 Action Statement (30) was entered when the Unit 1 Containment High Range Radiation Monitors were removed from service. In accordance with this Action Statement and our Accidental Radioactivity Release Monitoring and Sampling Methods procedure (Emergency J
Response Plan Implementation Procedure-821), alternate sampling methods were implemented. No unusual or unexpected readings were obtained during the period that the Unit 1 Containment High Range i
Radiation Monitors were not OPERABLE. The inoperability of the Containment High Range Radiation Monitors did not affect Unit 1 operation.
CAUSE OF INOPERABILITY The cause of the inoperability was the removal of the monitors from service to complete an approved modification.
PLANS AND SCIIEDULES FOR RESTORING TIIE SYSTEM TO OPERABLE STATUS The Unit 1 Containment High Range Radiation Monitors were removed from OPERABLE status on April 25,1997 at approximately 0940 and returned to OPERABLE status on May 3,1997 at approximately 1520. No further actions are required.
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