ML20207P641

From kanterella
Jump to navigation Jump to search
Rev 1 to Plant Leakage Monitoring
ML20207P641
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 01/05/1987
From: Gass K, Knightly J, Stewart D
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20207P454 List:
References
SWEC-SQN-13, SWEC-SQN-13-R01, SWEC-SQN-13-R1, NUDOCS 8701160355
Download: ML20207P641 (4)
v • d • e


Text

r 4

j ,,

TVA RMPIAYEE CONCERNS REPORT NUMBER: SWEC-SQN-13 y SPECIAL PROGRAM REPORT TYPE: Sequoyah Nuclear Plant Element REVISION NUMBER: 1 TITLE: Plant Leakage Monitoring REASON FOR REVISION: To incorporate TAS and SRP comments SWEC

SUMMARY

STATEMENT: The item in this report was identified by the Nuclear Regulatory Commission (NRC) and was included in the Stone & Webster Engineering Corporation (SWEC) systematic analysis. The item requires completion of corrective action planned by SQN.

PREPARATION PREPARED BY:

N -L b i SIGNATURE ' DATE REVIEWS PEER:

WS 44- /2~ Y- 96 SIGNATURE DATE TAS:

$$$ 8l /2"9~~S8 SIGNlTURE DATE CONCURRENCES CEG-H: /.2 /9/f 4 SRP: 4 m ff M.In1{0

/-5L87 SIGNATURE DATE SIGNATURE

  • DATE APPROVED BY:

!&{ ' / ~0-[7 N/A ECSP MAN MER DATE MANAGER OF NUCLEAR POWER -DATE CONCURRENCE (FINAL REPORT ONLY)

  • SRP Secretary's signature denotes SRP concurrences are in files.

2242T 8701160355 870109 PDR ADOCK 05000327

_ -- __. . - - l

a b

y ,

4 TENNESSEE VALLEY AUTHORITY WATTS BAR NUCLEAR PLANT EMPLOYEE CONCERNS TASK GROUP OTHER SITES CEG Element

Title:

Plant Leakage Monitoring SWEC Concern: A02841130004-001 Source Document: NRC Inspection 327, 328/84-28 Report Number: SWEC-SQN-13 9

l 2-[f C Evaluator: -

J. J. Knightly Date Reviewed by: XM h / E % 9 G.

K. R. Gass Date Approved by:

A. G. Debbage Date 1785T

E R;part SWEC-SQN-13 i Plant Leakage Monitoring I. Introduction During the Nuclear Regulatory Commission (NRC) inspection of October 22-26, 1984, in the area of radioactive waste management, the inspector made an observation (not numbered) which was included in the Stone'& Webster Engineering Corporation (SWEC) systematic analysis:

A02841130004-001 - Plant leakage monitoring.

Information on the background, the corrective actions taken, the verification methodology and analysis, the completion status, and any pertinent references for this item is included in this report.

II. Verification of Item A02841130004-001 A. Background.

The NRC found that the high volume of plant leakage to the floor drain and. tritiated waste collection systems required full-time operation of the 11guld radwaste system and had made necessary substantial changes to the radwaste processing system described in the Final Safety Analysis Report (FSAR). . Plant leakage was averaging 14,000 gallons per day per operating unit (July 1983.

through June 1984). NRC stated that SQN had not made a significant effort to reduce plant leak rates to levels which could be processed on an intermittent basis. NUREG-0737 (reference B) l requires that leakage be reduced to as-low-as-practical levels. IR1 B. Corrective Actions Taken The supervisor of SQNs Radwaste Section stated September 1986 to ECTG that when leaks are identifiable and correctible they are taken care of. However, he stated that one underlying cause is basically a plant design problem requiring expensive modifications to' resolve thoroughly. The plant is not in violation of NRC or

~

environmental requirements; therefore, at that time, other areas required for plant startup are receiving priority. SQN radwaste and l project management personnel stated to ECTG on December 8,1986 that l SQN had drafted a contract for an outside evaluation of the liquid l radwaste system. The contract scope includes: 1) identification lR1 and evaluation of individual leakage sources, and 2) evaluation of -l the overall system with recommendations for modification as needed. l Project management personnel stated that the contract has not yet l been issued but that approval is expected, i Page 1 of 2

o

.. o C. Verification Methodology. The SWEC concern identified for Employee

- Concerns Task Group (ECTG) verification was stated as follows:

RIMS # ISSUE RIMS ITEM A02841130004 Volume of plant leakage (units 1 RIMS-001 and 2) require full-time operations of liquid radwaste system. No significant effort by TVA to reduce plant leak rates is evident.

ECTG reviewed the Sequoyah Compliance Licensing files for internal and external correspondence related to this issue. This review of the pertinent documentation, in addition to discussions with plant waste management personnel, formed the basis for this verification activity.

D. Verification Analysis:

The Radwaste section supervisor stated that leakage is averaging 7,000 gallons per day, but is expected to rise to 14,000 gallons per day after plant startup. He stated that this leakage is not a significant general safety factor; however, it is a matter of concern to SQN and the NRC. Project management personnel stated l that the planned contract for evaluation of the system has l startup-dependent schedule dates. Evaluation is to begin 30 days I prior to startup and be completed five months after startup. The IR1 purpose of the schedule la to enable plant operation patterns of l 1eakage to be studied rather than the patterns existing during the l present plant shutdown. l E. Completion Status:

The SWEC concern is substantiated. The volume of plant leakage is not in violation of NRC or environmental requirements, but is a matter of concern. SQN is planning for an independent evaluation l of the liquid radwaste system to begin prior to plant startup, with lR1 corrective actions to follow. The SWEC item remains open. '

l III. References A. NRC Inspection Report Numbers 50-327/84-28 and 50-328/84-28, dated November 23, 1984, from D. M. Vercelli to H. G. Parris.

B. NUREG-0737. Post-TMI Requirements for Operating Reactors, dated l l October 31, 1980. NUREG-0737, Supplement 1. Clarification of TMI lR1 i Action Plan Requirements, dated January 1983. l 4

i i

Page 2 of 2

Retrieved from "https://kanterella.com/w/index.php?title=ML20207P641&oldid=3084258"