ML20039F333

Final Deficiency Rept Re Nonsafety HVAC for Class IE Motor Control Ctrs,Initially Reported 811017.Design Change Has Been Developed & Issued & safety-related Units Have Been Purchased for Installation

ML20039F333
Person / Time
Site:	Harris
Issue date:	12/28/1981
From:	Chiangi N CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8201120351
Download: ML20039F333 (4)

Text

,__ y y *t Carolina Phega"fthe chiapany M E OR r;l,,

2a e s File: SH N-2/18 O Item 52 9 9 Mr. James P. O'Reilly S' j $ 1 11982 7 11 -

United States Nuclear Regulatory Ccamission -

Region II Q', g vde"D[o.. . .f?

101 Marietta Street, Northwest j[N Atlanta, Georgia 30303 )NP ,y Q /

SHEARON HARRIS NUCLEAR POER PLANT DOCKET NOS. 50-400 AND 50-401 NONSAFETY HVAC FOR CLASS 1E MOTOR CONTROL CENTERS _

Dear Mr. O'Reilly:

Attached is the final report on the subject item which was deemed as reportable on October 27, 1980. During Ebasco's review of equipment against the temperature maps, some ESF-mlated (Class 1E) instrumentation which is not located in enviromentally-controlled areas was identified. This equipment was to be qualified to the maximum post-accident temperatures deterinined for each location or be relocated to envirorsnentally-controlled areas.

It has been determined that this instrumentation is qualified /specified to operate at the maximum post-accident temperatures determined for each location. This completes the corrective action for this mportability item.

RDB/gea Yours very truly, Attachment ec: Mr. G. Maxwe11 W/A

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Mr. V. Stello (2) W/A

• l N. J. Chia 1 - Manager Engineer Construction Quality Assurance / Quality Control DR 0 S

411 Fayetteville Street

• P. O. Box 1551

• Raleigh. N C. 2760? gg ,

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SIIEARON ilARRIS NUCLEAR POWER FIANT UNIT NO. 1 NONSAFETY HVAC FOR CLASS lE MOTOR CONTROL CENTERS Final Report December 18, 1981 Reportable Under 10CFR50.55(e)

Prepared by: Carolina Power & Light Company I

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SUBJECT:

10CFR50.55(e) Reportable Item Shearon Harris Nuclear Power Plant (SHNPP)

Nonsafety HVAC for Class lE Motor Control Centers ITDfS :

MCC's lA-35SA, MCC 1B-35SB, 2A-35SA & 2B-35SB SUPPLIED BY: Design - Ebasco Services, Inc.

l NATURE OF DEFICIENCY:

Class lE Motor Control Centers are not cooled by safety-related HVAC, as stated in the SHNPP FSAR.

DATE PROBLDI UAS CONFIRMED TO EXIST: October 17, 1930 PROBLEM REPORTED:

October 17, 1980 - CP&L (L. I. Loflin, K. V. Hate' & R. K.

Cothren) informed the NRC Region II office (Mr. J. K. Rausch) by telephone that the problem was "potentially reportable" under 10CFR50.55(e).

October 27, 1980 - CP&L (N. J. Chiangi) informed the NRC Region II office (Mr. J. K. Rausch) by telephone that the problem was reportable under 10CFR50.55(e).

SCOPE OF PROBLEM:

Equipment located in the common area of the Reactor Auxiliary Building (RAB) between Units 1 & 2 at Elevations 261 and 236 are not supplied with safety-related HVAC and may not be qualified for the room temperatures which will be reached in the event that electrical power and hence, ventilation, is lost.

REASON (S) PROBLDi WAS REPORTABLE:

Class lE equipment in the Unit One & Common Reactor Auxiliary Building is cooled by safety-related HVAC equipment in order to reduce the temperature extremes to which this equipment would be subjected in the event of a LOCA. The Motor Control Centers at the 261 elevation of the Units 1 & 2 Common RAB are Class 1E and are qualified to a room temperature of 104 F (40 C). The normal HVAC for this elevation, as well as the 236' common RAB elevation, has a Non-1E power supply. In the event of a loss of HVAC, the temperature in the area of the Motor Control Centers could exceed 104 F (piping containing 120 F fluid passes through this area). Since the Motor Control Centers are not qualified for temperatures above 104 F, the continued functioning of the MCC's cannot be certified.

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....

• s:

This condition deviates from the SHNPP FSAR Section 3.11.4.1 which states that " Plant areas containing ESF and RPS equipment and their support systems are temperature controlled to provide a controlled environment even during the most severe DBA condition".

Since the design of the Unit 1 and Common RAB has been approved and released for construction,'this condition constitutes a significant deficiency which does not conform to the criteria and bases stated in the Safety Analysis Report.

CORRECTIVE ACTION:

A design change has been developed and issued, and safety-related HVAC units have been purchased for installation at the 2S6 elevation of the Unit 1 and Common Reactor Auxiliary Building.

These MVAC units will provide safety-related ventilation to Motor Control Centers lA-35SA, 1B-35SB, 2A-35SA, and 2A-35SB.

In addition, the architect-engineer (Ebasco) prepared detailed temperature maps of the plant in order to verify that no such condition existed elsewhere in the plant. A detailed review of each equipment item against the temperature expected to exist in the area of the plant where the item is located has been completed, resulting in the identification of some ESF-related (Class 1E) instrumentation which is presently not located in environmentally-controlled areas. It has been determined that this instrumentation is qualified /specified to operate at the maximum post-accident temperatures determined for each location. This completes the corrective action for this reportability item.

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