ML18046B067
| ML18046B067 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 11/18/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| TASK-03-08.A, TASK-3-8.A, TASK-RR LSO5-81-11-036, LSO5-81-11-36, NUDOCS 8111200236 | |
| Download: ML18046B067 (6) | |
Text
Docket No. 50-255 LS05-8l-11-036 Mr. David P. Hoffman Nuclear Licensing Administrator Consumers Power Company 1 945 W. Parna 11 Road Jackson, Michigan 49201
Dear Mr. Hoffman:
November 18, 1 981
SUBJECT:
SYSTEMATIC EVALUATION PROGRAM TOPIC III-8.A, LOOSE PARTS MONITORING AND CORE BARREL VIRBRATION PROGRAM - PALISADES Enclosed is a copy of our evaluation of Systematic Evaluation Program Topic III-8.A.
You are requested to examine the facts upon which the staff has based its evaluation and respond either by confirming that the facts are correct, or by identifying errors and supplying the corrected information.
He en-courage you to supply any other material that might affect the staff's evaluation of this topic or be significant in the integrated assessment of your facility.
The need to actually implement a Loose Parts Monitoring Program will be determined during the integrated safety assessment.
Your response is requested as soon as possible. If no response is received by the time the next phase of the integrated assessment of your facility begins, we will assume that you have no comments or corrections.
Sincerely, Dennis M. Crutchfield, Chief Operating Reactors -8i:!aoch: No. 5 Division of Licensing
Enclosure:
As stated
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UNITED STATES NUCLEAR REGULATORY COMMISSION Docket No. 50-255 LS05 ll-036 Mr. David P. Hoffman WASHINGTON, D. C:20555 November 18, 1 981 Nuclear Licensing Administrator Cons~mers Power Company l945W. Parnall Road Jackson, Michigan 49201
Dear Mr. Hoffman:
SUBJECT:
SYSTEMATIC EVALUATION PROGRAM TOPIC III-8.A, LOOSE PARTS MON°ITORING AND CORE BARREL VIRBRATION PROGRAM - PALISADES Enclosed is a copy of our evaluation of Systematic Evaluation Program Topic III-8.A.
You are requested to examine the facts upon which the staff has based its evaluation and respond either by confirming that the facts are correct, or by identifying errors and supplying the corrected information.
We en-courage you to supply any other material that might affect the staff's evaluation of this topic or be significant in the integrated assessment of your facility.
The need to actually implement a Loose Parts Monitoring Program will be determined during the integrated safety assessment.
Your response is requested as soon as possible. If no response is received by the time the next phase of the integrated assessment of your facility begins, we will assume that you have no comments or corrections.
Enclosure:
As stated cc w/enclosure:
See next page Sincerely, Dennis M. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Licensing
- 4
SYSTEMATIC EVALUATION PROGRAM TOPIC III-8.A PALISADES TOPIC:
III-8.A LOOSE PARTS MONITORING AND CORE BARREL VIBRATION PROGRAM I.
INTRODUCTION The purpose of this topic is to review the inservice surveillance program to detect loose parts and excessive motion of the main core support structure.
The objective is to detect loose parts or excessive vi brat ion before they can cause fl ow blockage or mechanical damage to the fuel or other safety related components.
II.
REVIEW CRITERIA Standard Review Plan (SRP) Section 4.4, Regulatory Guide (R.G) 1.133 III.
RELATED SAFETY TOPICS AND INTERFACES V-1 COmplicance with codes and standards (10 CFR 50.55a)
IV.
REVIEW GUIDELINES Se.e Evaluation
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V.
EVALUATION
- 1.
LOOSE PARTS MONITORING:
R. G. 1.133, "Loose-Part Detection Program for the Primary System of Light-Water-Cooled Reactors, 11 Revision 1, describes features for monitoring loose parts within the reactor coolant pressure boundary (RCPB).
These features include sensors strategically located on the exterior surface of the RCPB capable of detecting acoustic disturbances, specifications for system sensitivity, alert levels, data acquisition modes and other system and procedural requirements.
Palisades does not have a loose
- parts moDitoring program that me~t the criteria of this guide.
- 2.
CORE BARREL VIBRATION:
Palisades was requested to perform core barrel vibration studies and to submit annual reports for NRC review.
Palisades'most recent report on the "Reactor Internal Noise Monitoring Tests 11 was submitted on May 4, 1981 (Ref. 1).
Our review of this report is continuing.
To date we have concluded that the neutron noise spectrum discussed in this recent report is similar to that sub-mitted in the previous reports which were reviewed and found acceptable (Refs. 2 and 3).
The noise surveillance tests were instituted to monitor the core barrel vi brat ion pro bl em.
The reports submitted by Consumers have provided confirmation that there are no unatceptable levels of core barrel motion.
VI.
CONCLUSION
- 1.
A Loose Parts Monitoring Program, (i.e., detection system and procedures as specified in Section C.2 and C-3 of R. G. l.133, Rev. 1) as currently required for new facilities does not exist at the Palisades facility.
- 2.
The neutron noise surveillance tests being performed at the Palisades facility are an acceptable basis for determining excessive levels of core barrel vibration and meet current licensing criteria.
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-e R'.:FERENCES
- 1.
David P. Hoffman (Consumers Power Co.) to J. G. Keppler (NRC) 11 Palisades Plant, Reactor Internals Noise Monitoring Tests 11 dated May 4, 1981.
- 2.
David P. Hoffman (Consumers Power Co.) to J. F. Keppler (NRC) 11 Palisades Plant, Reactor Internals Noise Monitoring Tests* dated June 4, l 980.
- 3.
R. C. Kryter (ORNL) to W. V. Johnston, (NRC) 11 Palisades Plant, Review of Reactor Internals Noise Monitoring Tests, 11 dated April 6, 1 981.
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