ML20247E370
| ML20247E370 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/29/1989 |
| From: | Hernan R Office of Nuclear Reactor Regulation |
| To: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| References | |
| GL-88-14, TAC-71730, NUDOCS 8904030049 | |
| Download: ML20247E370 (5) | |
Text
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NUCLEAR REGULATORY COMMISSION r/
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March 29, 1989 Docket No. 50-289 Mr. Henry D. Hukill, Vice President and Director - THI-1 l
GPU Nuclear Corporation P.'O. Box 480 Middletown, Pennsylvania 17057
Dear Mr. Hukill:
SUBJECT:
GPU RESPONSE TO GENERIC LETTER NO. 88-14 REGARDINGINSTRUMENTAIRSUPPLYPROBLEMS(TAC 71730)
This letter is to inform you that the NRC staff has received and completed its review of your February 24, 1989 response to the subject generic letter. Our conclusion is that the program described in your response will fully meet, if not exceed, the actions intended by the generic letter.
Your response refers numerous times to actions taken or planned as part of the Babcock and Wilcox Owners Group (BWOG) Safety and Performance Improvement Program (SPIP). The staff conducted a detailed review of the SPIP, including those items pertaining to instrument air systems, at the time of its implementation and issued a Safety Evaluation Report in November 1987 as NUREG-1231. Section 6.5.3 of that report states "the NRC staff concludes that the recommendations made by the BWOG adequately address recent NRC staff concerns related to air cleanliness, emergency procedures, maintenance, testing, and the overall importance of the instrument air system." The staff also recomended BWOG consideration of a one-time test of critical valves and instruments on a gradual loss of air. Our review of the status of SPIP implementation at TMI-1 as well as your response to Generic Letter No. 88-14 indicates the following:
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f GPUN has completed evaluation and implementation of 22 of 26 SPIP recommendations on instrument air systems that were judged to apply to TMI-1. A listing of these recommendations and their status is presented in the Enclosure.
Modifications to the instrument air systems to implement SPIP recommendations have been shown on the TMI-1 integrated schedule since April 1988 for the 1987-90 time frame. One of these modifications involves installation of an additional air compressor to improve system reliability and capacity.
Your response to Generic Letter No. 88-14 comits to instrument air quality testing by July 1, 1989, several modifications to the system over the next two fuel cycles and refueling outages, a one-time loss-of-air-test of various safety-related components by the 8904030049 890329
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Mr.. Henry D. Hukill Three Mile Island Nuclear Station, GPU Nuclear Corporation Unit No. I cc:
G. Broughton Francis I. Young O&M Director, TNI-1 SeniorResidentInspector(TMI-1)
GPU Nuclear Corporation U.S.N.R.C.
Post Office Box 480 Post Office Box 311 Middletown, Pennsylvania 17057 Middletown, Pennsylvania 17057 Richard J. McGoey Manager, PWR Licensing Regional Administrator, Region I GPU Nuclear Corporation U.S. Nuclear Regulatory Commission 100 Interpace Parkway 475 Allendale Road Parsippany, New Jersey 70754 King of Prussia, Pennsylvania 19406 C. W. Sntyth Robert B. Borsum TMI-1 Licensing Manager Babcock & Wilcox GPU Nuclear Corporation Nuclear Power Generation Division-Post Office Box 480 Suite 525 Middletown, Pennsylvania 17057 1700 Rockville Pike Rockville, Maryland 20852 Ernest L. Blake, Jr., Esq.
Governor's Office of State Planning Shaw, Pittman, Potts & Trowbridge and Development 2300 N Street, N.W.
ATTN: Coordinator, Pennsy'lvania -
Washington, D.C.
20037 State Clearinghouse Post Office Box 1323 Harrisburg, Pennsylvania 17120 Sally S. Klein, Chairman Thomas M. Gerusky, Director Dauphin County Commissioner Bureau of Radiation Protection Dauphin County Courthouse Pennsylvania Department of Front and Market Streets Environmental Resources Harrisburg, Pennsylvania 17120 Post Office Box 2063 Harrisburg, Pennsylvania 17120 Lenneth E. Witmer, Chairman Board of Supervisors l
of Londonderry Township 25 Roslyn Road Eilzabethtown, PA 17022 1
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l Enclosure TMI-1 Instrument Air System SPIP Status SPIP Recommendation-Implementation No. =
Subject Status-
'TR-120-IAS' Check 0-rings in critical air-operated Complete valves.
TR-121-IAS Make appropriate personnel aware of Complete importance of instrument air system prohibition of use for tools and need to. report air system damage.
TR-122-IAS' Instrument air systems should be Complete systematically inspected for leaks TR-123-IAS For instrument air systems, protect Complete against failures possible with desic-cant type driers.
TR-124-IAS Identify instrument air system metal line Complete with high vibration and when cracks are
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found, replace with flexible tubing.
TR-125-IAS Operability testing of critical air-operated Testing scheduled valves should be performed in the for BR refueling-preventive maintenance program.
(4/90).
TR-126-IAS Compare instrument air system configuration Modifications with functional target criteria.
scheduled for 8R and 9R refuelings.
TR-127-IAS For instrument air system, review preventive Procedure maintenance program, identifying parameters revisions in for trending to determine maint, requirements, progress.
TR-128-IAS Review training and loss of air response pro-Complete cedures for instrument air system.
TR-129-IAS Install automatic bypass line around driers Complete and filters.
TR-130-IAS Expand procedure for the loss of instrument Complete air.
TR-133-IAS Add a filtration system downstream of the last Complete drier in the instrument air system.
TR-134-IAS Install control room-operated isolation valves Complete with manual bypass at the key line feeding each units's aux. b1dg. instrument air system header.
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.. - l TR-135-IAS Install automatic isolation valves that could Complete i
i limit instrument air system leaks.
TR-137-IAS Check accumulators in instrument air systems Complete
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for water buildup.
Install drain valves where i
necessary.
1 TR-140-IAS
. Assign high maintenance priority to an out-Complete l
of-service air compressor and maintain sufficient spare parts to repair a compressor within a week.
TR-141-IAS Install an automatic bypass valve to bypass Complete driers and filters upon loss of instrument air header pressure.
TR-142-IAS The components of the instrument air system Complete should be designed to withstand maximum flow generated by all the compressors.
TR-143-IAS Inspect accumulators and their check valves in Testing scheduled the instrument air system.
for DR Refueling (4/90)
TR-144-IAS Develop or upgrade a loss-of-instrument air Complete procedure.
TR-145-IAS Install automatic isolation valves in instru-Complete ment air lines.
TR-146-IAS Loss of procedure for instrument air system Complete should note importance of quickly bypassing driers and filters when excessive flow rates are experienced.
TR-148-IAS Install automatic isolation valves at specified Complete points in instrument air system.
TR-149-IAS Instrument air system components should be Complete designed to withstand maximum flow generated by all compressors.
TR-150-IAS The ESFAS signal to close specified valves and Complete isolate service and control air should be eliminated.
TR-153-IAS A plant specific air system failure evaluation Complete should be made.
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'Mr. Henry D. Hukill. -
en'd of the 8R outage and pressure integrity testing of selected air accumulators and' associated tubing / piping by the end of the 8R outage.
Review and upgrade, where necessary, of procedures and training for operators and maintenance personnel has been completed with a few exceptions (e.g., preventive maintenance program procedures).
Engineering reviews as discussed in Generic Letter No. 88-14 have been completed with the exception of review of the confirmation testing yet to be completed. The overall goal of these evaluations and tests is to ensure that the subject air-operated components and systems will perform their intended functions during all design-basis events.
Based upon the program discussed above, the staff concludes that GPUN has been
. responsive to the NRC's concerns regarding instrument air system problems and, specifically, to the NRC requests delineated in Generic Letter No. 88-14.
Based upon your current schedules, the staff understands that this program will be completely implemented by the completion of the 9R refueling outage, estimated to be December 1991. Progress of this program will be followed by the Project Manager and Region I personnel. You are requested to provide written notification when implementation has been completed.
Sincerely, Original signed by Ronald W. Hernan, Senior Project Manager Project Directorate I-4 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
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