GO2-83-116, Final Part 21 & Deficiency Rept Re Recombiner Scrubber Drainage Impaired by Design Configuration of Connections for Water Loop Seal & Process Blower on Recombiner Skid. Initially Reported on 831215

Final Part 21 & Deficiency Rept Re Recombiner Scrubber Drainage Impaired by Design Configuration of Connections for Water Loop Seal & Process Blower on Recombiner Skid. Initially Reported on 831215

ML20083G758
Person / Time
Site:	Columbia
Issue date:	12/16/1983
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
REF-PT21-84-347-000 306, GO2-83-1168, PT21-84-347-000, NUDOCS 8401040333
Download: ML20083G758 (3)

Text

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RECEIVED

!TC Washington Public Power Supply System P.O. Box 968 3000 GeorgeWashingtonWay Richland, Washington 99352 (509)372-5000 r33 DEC 22 I"!!: 13 December 16, 1983 G02-83-1168 REGIOT/!ti Mr. J. B. Martin Regional Administrator U.S. Nuclear Regulatory Commission Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596

Subject:

NUCLEAR PROJECT NO. 2 10CFR50,55(e) REPORTABLE CONDITION #306 HYDROGEN RECOMBINER SCRUBBER DRAINAGE PROBLEM

Reference:

Telecon conference call, dated December 15, 1983, G.H. Ross, R.T. Johnson, G.K. Afflerbach, WNP-2 and D. Willett, Region V.

In accordance with the provisions of 10CFR50.55(e), your office was informed by the reference of the above subject condition. The attachment provides the Project's final response on Condition #306.

If there are any questions concerning this matter, please contact Roger Johnson, WNP-2 Project QA Manager, (509) 377-2501, extension 2712.

/$( f .can G. C. Sorensen Manager, Regulatory Programs JGT/kd

Attachment:

As stated cc: W.S. Chin, BPA N.D. Lewis, EFSEC A. Toth, NRC Resident Inspector Document Control Desk, NRC 8401040333 831216 PDR ADOCK 03000397

, S PDR 9

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9 WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 DOCKET N0. 50-397 LICENSE NO. CPPR-93 10CFR50.55(e) CONDITION #306 HYDR 0 GEN RECOMBINER SCRUBBER DRAINAGE PROBLEM FINAL REPORT Description of the Deficiency Drainage from the recombiner scrubber (CAC-AW-1A/lB) is impaired by the design configuration on the recombiner skid of connections for the water loop seal and the process blower CAC-FN-1A/lB. The elevation difference between the loop seal connection and the blo.er is insufficient to osercoine the negative pressure in the blower container allowing clearing of tLe drain lines.

Safety Significance The hydrogen recombiners are a portion of the equipment which forms the Con-tainment Atmospheric Control System. The system is intended to provide control of hydrogen and oxygen generated following a LOCA. The redundance of the equip-ment in the system is intended to prevent a single active failure from preclud-ing system availability.

The deficiency precludes operation of the scrubber as evaluated in the contain-ment atmospheric control system failure analysis (FSAR - Page 6.2-149). The condition is therefore considered a significant deficiency in the final design as approved for construction such that the design does not conform to the cri-teria and basis stated in the Safety Analysis Report and is therefore report-able under the provisions of 10CFR50.55(e).

Cause of Deficiency The recombiner was shop tested and accepted under the Burns and Roe, Inc. (BRI)

Supplier Surveillance Program. The manufacturer, Industrial Air Products and Chemical, Inc. of Allentown, Pennsylvania, had to test the units several times and experienced similar drainage problem. They made modifications to the units and they passed the acceptance test; however, the test had (1) specific excep-tion that the loop seal drain could not be installed such that the unit could be tested in its present configuration. The condition is considered to be a design deficiency (Part 21) on the part of the supplier unique to WNP-2 which was not discovered during acceptance testing.

Corrective Action Supply System Engineering is revising the drainage piping configuration to assure water cannot be entrapped in the unit due to the blower suction pressure.

(Ref. SPED S215-M-6860).

Completion of this work is not required for fuel load, but will be completed prior to establishing primary containment integrity for power ascension testing.

' Final R port - #306

'Page 2 of 2-Action to Prevent Recurrence

-Startup testing is intended to provide. functional verification of the design and remains the principal tool to _ identify latent problems. The Suppliers Quality Assurance Program and the Owners AE Surveillance Program were intended

'to preclude this type deficiency. All major equipment covered by these programs has been installed and is being tested; therefore, no action to prevent recur-rence is appropriate.

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