ML20236J496

Forwards Biweekly Status Rept from Resident Staff at Plant for 871009-23

ML20236J496
Person / Time
Site:	Dresden
Issue date:	11/01/1987
From:	Ring M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Norelius C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8711060143
Download: ML20236J496 (4)

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Nov 1 .ign MEMORANDUM FOR: Char'les E. Norelius, Director, Division of Reactor Projects FROM: Mark A. Ring, Chief, Reactor Projects Section 1C SUEJECT: DRESDEN STATUS REPORT.FOR THE PERIOD OCTOBER 9 -

OCTOBER 23,~1987 Enclosed is the Dresden bi-Weekly status report from.the NRC Resident Office at Dresden. The NRC resident staff and two (2) region-based inspectors monitored activities at the plant during the report period.

These status reports are intended to provide NRC management and the public

'with an overview of plant activities.and NRC inspection activities.

Subsequent inspection reports will address many of these topics in more detail.

Original Signed by Mark A. Ring Mark A. Rin; Chief Reactor Projects Section 1C

Enclosure:

As stated 1

cc w/ enclosure:

D. 3utterfield, Nuclear Licensing Manager J, Eenigenburg, Plant Manager DCD/DCS (RIOS)

Licensing Fee Management Branch Resident Inspector, RIII Richard Hubbard J. W. McCaffrey, Chief, Public Utilities Division B711060143 a71101 O PDR ADOCK 0500 R

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DRESDEN_2AND3STATUSREPORTFORPERIODOCTOBER9THROUGHOCTOBE 23, 1987 l , 1.

, PLANT STATUS

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A. Unit 2

.On October 23, 1987, as of 2:30 p.'m. (CDT), the unit was operating j at 52% power and holding constant for the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> preconditioning  !

fuel soak time.since the reactor scram on October 20, 1987.

B. Uft3 On October 23, 1987, as of 2:30 p.m. (CDT), the unit was operating at 96% power in its 24th day of operation.

2. FACILITY OPERATIONS

SUMMARY

A. Unit Operating Status (August 17 through 28) 1 J. Unit 2 10/9 thru 10/20 Operating between 95 and 100% power. '

j 10/12 1/2 Group I isolation on "B" MSt. l.ow Pressur.e at 11:20 a.m.

10/14 1/2 Group I Isolation on "B" MSL Low Pressure at 2.:47 a.m. l 10/20 Rx Scram from 100% power at 2:24 a.m.

10/21 Rx Critical again at 4:45 a.n.

10/22 Turbine synchror.ized to the prid at 10:34 p.rn.

10/23 Operating at 52% power and holding for 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> soak time.

2. Unit 3 10/9 thru 10/12 Operating between 65 and 75% power.  !

l 10/12 thru 10/23 Steady load between 75 and 95% power.

Load limited by 3D1 High Pressure Heater being Out-of-Service.

10/17 thru 10/18 Load drop for week end surveillance.

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8. PROGRAMS INITIATED During the bi-weekly period, the licensee initiated a new program to ensure that additional licensed operators will be available during the normal day shift to assist the unit operators with the administrative and operational work loads. This program will also ensure that licensed operators will not exceed the administrative limits for working hours. This is in further response to a licensed operator exceeding the " Nuclear Power Plant Staff Working Hours" policy statement recommendations as reported in the first bi-weekly status report for the period of August 17 through 28, 1987.

3. ITEM OF SPECIAL INTEREST j Unit 2 Reactor Scram from Spurious Scram Signal

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On October 20, 1987, Unit 2 scrammed from about 100% power. The scram occurred during. performance of the Main Steam Line functional test on the "C" Line Radiation Monitor. At the same time, a spurious scram signal occurred on the "B" Main Steam Line Low Pressure Monitor. The "8" line

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low pressure switches have a history of spurious scram signals caused by j vibration of the switches. Since January 1987, there have been 27 half. A scrams and isolations, including two half Group I isolations on October 12 l and 14, associated with the "B" low pressure switches (all but one at above 90% power) and one reactor scram (on October 20). The licensee had previously initiated a modification to install vibration dampers, but had not completed the engineering review until recently. Because of the i scram, the licensee's management decided to install the modification 1 prior to commenring a unit startup frcm the scram.

The modification was completed on October 21, 1987, and the unit was returned to powcr. The Resident Staff observed the modification installation and will observe the unit performance to evaluate the {

effectiveness of the modification. {

4. CHANGE TO HONTHLY STATUS REPORTING

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This is the fifth status report of the series and the next period will be l

l October 23 through November 6, 1987. l

5. NRC STAFF ACTIVITIES DURING THE PERIOD I I

A. NRC Resident Staff During this period the inspection staff at Dresden was comprised of the following personnel:

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l S. DuPont, Acting Senior Resident Inspector P. Kaufman, Resident Inspector

1. Routine Inspections l j

g Two resident inspectors monitored plant operating activities ]

between October 9 and October 23, 1987.

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The Unit 2 shutdown on October 20 and the Unit 2 startup on <

October 21 were both observed. The staff observed the ,

corrective actions and return-to-service testing.

2. Reactive' Inspections The staff responded to the Unit 2 Reactor Scram on October 20.

4 B. Region Staff

1. Routine Inspections One Regional Inspector was on site October 21-23 reviewing the ;

installation process used for fire seals' in penetrations.

2. Reactive Inspections One Regional Inspector was on site.0ctober 15, reviewing the September 22, 1987, LPCI transient and Flued Head Anchors used for containment penetrations.

C. Headquarters Staff On October 23, Commissioner K. Rogers toured Dresden and met with  !

the licensee. Items discussed included the improvements the  ;

licensee has made in most performance indicators and improvements still needed in scram reductinn. C. Paperiello, Deputy Regional Administrator, N. Chrissotimos, Deputy Director of Reactor Safety, M. Ring, Section Chief and the Resident Staff accompanied Commissioner Rogers on his tour.

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