ML20235N379

Forwards Bimonthly Progress Rept 6 Re New Switchgear Bldg Const,Per 860930 Commitment

ML20235N379
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	09/30/1987
From:	Mroczka E CONNECTICUT YANKEE ATOMIC POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
B12690, NUDOCS 8710060500
Download: ML20235N379 (6)

Text

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i CONNECTICUT YANKEE ATOMIC POWER COMPANY B E R L I N. CONNECTICUT P.o. Box 270

• HARTFORD. CONNECTICUT 06141-0270 TELEPHONE ro>ees.sooo September 30,1987 Docket No. 50-213 B12690 Re: 10 CFR 50, Appendix R U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Gentlemen:

Haddam Neck Plant Bimonthly Progress Report No. 6 New Switchgear Building Construction On September 30, 1986,(I) Connecticut Yankee Atomic Power Company committed to provide the NRC Staff with updated bimonthly progress reports in accordance with the major milestone schedule for construction of the new switchgear building at the Haddam Neck Plant. The purpose of this letter is to provide the NRC Staff with the sixth of these reports. Bimonthly Progress Report No. 6 is included as Attachment 1.

We trust you will find this information satisfactory, and we remain available to assist you in the review of this matter.

Very truly yours,

[ CONNECTICUT YANKEE ATOMIC POWER COMPANY

/Aue E.T./)droczka (/

s Senror Vice President j l

cc: W. T. Russell, Region 1 Administrator

3. T. Shediosky Resident Inspector, Haddam Neck Plant F. M. Akstulewicz, NRC Project Manager, Haddam Neck Plant (1) J. F. Opeka letter to C. I. Grimes, dated September 30,1986, "Haddam Neck Plant, Major Implementation Milestone, New Switchgear Building Construction."

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Docket No. 50-213 B12690 l

I Attachment I Haddam Neck Plant '

Bimonthly Progress Report No. 6 New Switchgear Building Construction September,1987

Attachment 1 '

l B12690/Page1 Haddam Neck Plant Bimonthly Progress Report No. 6 New Switchgear Building Construction

SUMMARY

In a letter dated June 30, 1986,(1) the Connecticut Yankee Atomic Power Company -(CYAPCO) provided the NRC Staff with the conceptual design information for the new switchgear building at the Haddam Neck Plant, including a description of the new facility. The major milestone schedule for the construction and implementation phases of this project was provided to the NRC Staff in a letter dated September 30, 1986(2) and committed to provide the NRC Staff with bimonthly progress reports. The following is a breakdown of the major activities accomplished and ongoing for the sixth reporting period.

PROJECT

SUMMARY

An accelerated schedule was implemented for the new Switchgear Building in an effort to recover a portion of the time lost due to technical difficulties with the excavation and dewatering of the foundation. This accelerated schedule incorporates a work schedule of six 10-hour days through the completion of outage related activities, and five 10-hour days thereaf ter until building close-in, which is expected to be achieved by December 23,1987 under this plan.

Construction activities are proceeding in support of this schedule, with placement of the concrete mud-mat on August 21, 1987, and the foundation placement on September 10, 1987. Work is currently in progress on the installation of reinforcing steel for the walls to elevation 25' 6", which is expected to be completed early next month. Work was completed on the j replacement of the four load center transformers.

A reevaluation of engineering commitments was completed this month based on the accelerated construction schedule, and a revised Project Integrated Schedule was developed.

(1) 3. F. Opeka letter to C.1. Grimes, dated June 30,1986, "Haddam Neck Plant, Conceptual Design of the New Switchgear Room."

(2) 3. F. Opeka letter to C.1. Grimes, dated September 30,1986, "Haddam Neck Plant, Major Implementation Milestones, New Switchgear Building Construction." l u

l

O Attachment 1 B12690/Page 2

SUMMARY

OF MAJOR WORK ACTIVITIES Engineering

1. New Switchgear Building Design changes were made in the sheetpiling and excavation details to accomodate existing field conditions in >the elevation of rock and the extent of the loose soil on the north and east sides of the building.. Changes were also made in reinforcing steel around the ductbank penetrations to accommodate the new ductbank design.

2. HVAC and Fire Protection Designs Technical bid evaluations were completed this month on the dampers, sprinkler system, and halon system. A pre-award meeting was held with the bidders on the halon system to review the scope of work and address technical issues. In support of the revised integrated schedule, the HVAC portion of this work will be issued separately, under PDCR No. 868, with the Fire Protection Systems issued under new PDCR No. 917. Work continued this month on the raceway layout for the HVAC and building auxiliaries. The design of the HVAC duct and duct support details was completed and issued i

for review.

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3. Appendix R Equipment A number of specifications for the Appendix R equipment were issued for purchase this reporting period, including:

I l Vital AC Power Supply J l Emergency Lighting Units 480 V AC Distribution Panel Battery Charger (Spare Parts)

DC Distribution Switchboard

4. Installation of Ductbanks The design of the ductbanks continued this month to accommodate the relocation of the new Switchgear Building and the existing loose j fill material at the south end of the building. The initial draf t was  ;

revised to accommodate these changes and will be issued for review early next month,

5. Stair Tower and Walkways l

The conceptual design for , the stair towers and walkways was 1 coordinated with p! ant personnel and issued for review. A decision was made to incorporate the foundations for the stair tower in a revision in order to allow concrete placement prior to winter conditions, l

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] 6. Load Ce mr Transformer Replacement p v $s , 4 s

NCR48qis [esolved regarding abrasions and inderitadons in the existing niedium voltage power caHe to the k4 center transformer. r',In addition, an interference was fes conduit supports to the transformer alarm circuiu;. he \ ged for the 4 s i ,

7. Existing Switchgear Room DC System Relocation

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Material Requisition 18691-E-550 fo'r the nd'bcttely racy w.as issued for bids. In addition, .a scheme to accomph) the pre;>osed ,

connection of safety-related Busse 51 and 2 to nonsafe*4related Bus #

3 ,was established. Two spU amp brukers we e' added in

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t edification 18691-E-520 and' associated single line to refled0the new scheme. The dc single lines were issued for construction, e

8. Raceway in New Swie:hgear Building The bid evaluatiow ,pr)the cable tray was started.

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9. Inr+rumentation for Append.9 This irrtrUrbentation scope'is $urrently under review by CYAPCO.

f Containment walkdowns in s"pport of the new design were completed on September 18, 1987.

10. Cable Installation /.

A bid evaluation was performed for the control cable specification.

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11. Modification of Metering Pump Speed Controller Material Requisition 18691-3-703 for the metering pump speed activator was issued for review. -

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12. Raceway to Appendix R Loads A walkdown was performed to locate conduits in the Primary Auxiliary Building, Diesel Generator Building and Service Building this month. Additiona' s'alkdowns in these arear, and the cable vault will be performed next i..onth.

13. MOVs for ECCS Small Break LOCA 4 Schematic diagrams, connection draw;ogs, and panel layout drawings for the small break LOCA MOVs ve.o issued this month, and a walkdown for the raceway associa ted with these circuits was per f ormed.

14. New Equipment - Old Switchger Room A field walkdown to locate the MCC and associated raceway was performed in support of design activities.

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a Attachment 1 B12690/Page 4 l.

f9f 2. Procurement rf 1; l

Awards Made t

.The following awards were placed this reporting period:

i Power Distribution Panel Filter Unit i Fire Protection Valves

2. Purchase Orders Placed The following purchase orders and subcontracts were placed this reporting period:

a. Miscellaneous items Emergency 1,ighting Units Holst Miscellaneous Fans 1

3. Bid Evaluations - Miscellaneous items The following bid evaluations were completed this reporting period:

l 600 V Control Cable

! 1000 V Power Cable l- 600 V Instrument Cable Dampers Wet Pipe Sprinkler System Halon S) stem

3. Construction

1. Outage Related Work l

Work was completed this reporting period on the replacement of all four load center transformers which were successfully turned over to the plant. Also, work was completed en the installation of the SKV breaker.

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