ML20198G046

Notification of 860528-29 Meetings W/Util in San Francisco, CA to Discuss LTSP Efforts Re Geology Seismology & Geophysics in Progress by Util & Consultants

ML20198G046
Person / Time
Site:	Diablo Canyon
Issue date:	05/22/1986
From:	Schierling H Office of Nuclear Reactor Regulation
To:	Harold Denton, Eisenhut D, Lyons J NRC
Shared Package
ML20197G068	List: IA-86-744, Submits Daily Highlight.On 860930,util Commenced Unloading Spent Fuel from Unit 1 Into Original Racks,Reinstalled Into Unit 1 Pool.On 861001,fuel Assembly Element in Reactor Vessel Tipped Into Unloaded Assemblies.No Fuel Damage ML20197G063 ML20197G272 ML20197G348 ML20197G378 ML20197G383 ML20197G406 ML20197G411 ML20197H807 ML20197J383 ML20197J432 ML20198G046 ML20210U819 ML20211H655 ML20211N838 ML20214N656 ML20215D091 ML20215N496
References
FOIA-86-744 NUDOCS 8605290205
Download: ML20198G046 (1)

Text

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May 22, 1986 Docket Nos. 50-275 and 50-323 MEMORANDUM FOR: H. Denton R. Houston L. Rubenstein D. Eisenhut D. Crutchfield J. B. Youngblood

-J. Lyons E. Rossi V. Noonan H. Thompson G. Lainas G. Lear F. Miraglia T. Speis C. Berlinger R. Bernero W. Russell G. Holahan V. Benaroya T. Novak J. Milhoan F. Schroeder D. Vassallo THRU: Steven A. Yarga, Director PWR Project Directorate No. 3 Division of PWR Licensing-A FROM: Hans E. Schierling, Senior Project Manager PWR Project Directorate No. 3 Division of PWR Licensing-A

SUBJECT:

DAILY HIGHLIGHT - MEETING NOTICE DATE AND TIME: May 28 and 29, 1986 8:30 a.m.

LOCATION: PG&E Offices Conference Room A, Ground Floor 245 Market Street Building San Francisco, CA-PURPOSE: To discuss in detail the LTSP efforts regarding geology, seismology and geophysics in progress by PG&E and consultants.

PARTICIPANTS: NRC: H. Schierling, L. Reiter, R. McMullen, G. Giese-Koch, D. Slemons (U of Nevada), R. Brown (USGS), et al.

PG&E: L. Cluff, D. Hamilton, K. Coppersmith, W. Savage, et al.

/s/HSchierling Hans E. Schierling, Senior Project Manager PWR Project Directorate No. 3 Division of PWR Licensing-A, NRR PADf3 HSchierl ? ng;ps 05 41/86 860529020 60522 ADOCK 0500027 }

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November 29, 1985 Docket No. 50-275

-MEMORANDUM FOR: H. Denton R. Houston L. Rubenstein D. Eisenhut D. Crutchfield J. B. Youngblood J. Lyons J. Knight V. Noonan H. Thompson G. Lainas F. Miraglia T. Speis R. Bernero W. Russell T. Novak G. Holahan F. Schroeder G. Lear THRU: Steven A. Varga, Director PWR Project Directorate #3 Division of PWR Licensing-A FROM: Hans Schierling, Project Manager PWR Project Directorate #3 Division of PWR Licensing-A

SUBJECT:

DAILY HIGHLIGHT Plant Name Diablo Canyon Power Plant, Unit 1 With the plant at about 0.5% power, the reactor tripped on steam flow / feed flow mismatch coincident with steam generator low-level signal. The flow mismatch was a momentary upset caused by opening the turbine stop valves'in the process of latching the turbine. With one steam generator level bistable tripped because the channel was out of service, the coincident mismatch signal made up the logic for the reactor trip. Trip breaker Train A opened but trip breaker Train B did not open. Both breakers have the shunt trip attachment installed.

The licensee's review of the sequence of events indicated the trip signal duration was for one cycle, or 15 milliseconds. Subsequent testing indicates that about 70 to 80 milliseconds are required for the breakers to actuate. Why the Train A breaker opened in light of this finding is still under investigation. The licensee has verified the operability of the breakers, including the testing of the undervoltage trip attachment, and additional review of the event is still underway.

This infonnation was received at 9:20 a.m. this date, from Bob Magruder, shift foreman at Diablo Canyon 2.

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MEMORANDUM FOR: H. Denton, NRR .

D. Eisenhut NRR J. Lyons. TOS8, NRR H. Thompson, DL F. Miraglia, DL T. Novak DL '

W. Russell Acting Dimetor, DHFS J. Knight, Acting Director, DE _ . .

R. Bernero, DSI T. Speis, DST .

B. Snyder, TMIPO, NRR G. Holahan, ORAB ,

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D. Crutchfield, DL TimU: George W. Knighton, Chief Licensing Branch No. 3 '

Division of Licensing FRON: . Hans Schierling Project Manager Licensing Branch No. 3 Division of Licensing

SUBJECT:

DAILY HIGHLIGHT L.5;$f,,:

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Diablo Canyon - High Density Spent Fuel Storage "

By letter dated September 19, 1985, PG&E submitted a report describing high u density spent fuel storage modifications for Diablo Canyon Units 1 and 2. PG&E' will submit the appropriate License Amendment Request in the near future. PG&E intends to install the new fuel storage racks in a dry spent fuel pool condition to reduce radiation exposure to plant personnel and to simplify overall installation work. The first refueling outage for Unit I could occur as early as July 1986 (Unit I went comercial in May 1985).

The matter of high density spent fuel storage at Diablo Canyon has already -

received public attention in the San Luis Obispo area earlier this year. The City Council requested the California Legislature to hold exploratory '

public hearings. We will place promptly the PG&E submittal into the Local PubTic.

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R. Bernero, DSI T. Speis, DST B. Snyder, TMIPO G. Holahan, ORAB G. - Lainas , DL - -

D. Crutchfield, DL THRU: George W. Knighton, Chief FROM: Hans Schierling, Project Manager

SUBJECT:

DAILY HIGHLIGHT o b Yo On July ~ 15, 1985 OI:RV received five documents (approximately li inch) from GAP that contain further allegations, possibly containing infonnation concerning OI. investigations. A copy was provided to Region V and NRR.

Region V is currently reviewing the information for specific allegations and for assignment of review responsibility. Dissemination of the infonna-tion in the documents will be within NRC only on a need-to-know basis until further instructions by 01.

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Hans Schierling, Project Manager Licensing Branch No. 3 Division of Licensing DISTRIBUTION Docket File L8#3 Reading File JLee HSchierling EWeinkam JLyons S81ack 1

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JUL 0 9 1985 MEMORANDUM FOR: H. Denton, NRR D. Eisenhut, HRR G. Edison, TOSB', NRR  !

H. Thompson, DL 1 F. Miraglia, DL T. Novak, DL W. Russell, Acting Director, DHFS J. Knight, Acting Director, DE R. Bernero, DSI T. Speis, DST B. Snyder, TMIPO, NRR G. Holahan, ORAB G. Lainas, DL D. Crutchfield, DL --

THRU: George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing FROM: Hans Schierling, Project Manager Licensing Branch No. 3 Division of Licensing

SUBJECT:

DAILY HIGHLIGHT Diablo Canyon - Brush Fire Near San Luis Obispo The brush fire near the city of San Luis Obispo is approximately 10 miles ENE from the Diablo Canyon site. As of Monday afternoon the fire was approaching State Highway 101 from the east. Parts of the city have been evacuated. The airport was temporarily closed due to heavy air traffic associated with the fire fighting. On July 4th transmission via the Midway line to the east was switched temporarily to the Gates line to the north for precautionary reasons. Unit 1 is operating at 100 percent power.

PG8E is monitoring the situation.

Hans Schierling, Project Manager Licensing Branch No. 3 Division of Licensing Distribution:

Docket-File LBdReading JLee HSchierling AD/LTechnicalAssistant(E.Weinkam)

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50-2 FS MEMORANDUM FOR: H. D nt::n, NRR .50-3 5 D. Eisenhut, NRR G. Edison, TOSB, NRR H. Thompson, DL F. Miraglia, DL T. Novak, DL W. Russell, Acting Director, DHFS J. Knight, Acting Director, DE R. Bernero, DSI T. Speis, DST B. Snyder. TMIPO, NRR G. Holahan, ORAB G. Lainas DL D. Crutchfield. DL THRU: George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing FROM: Hans Schierling, Project Manager Licensing Branch No. 3 Division of Licensing

SUBJECT:

DAILY HIGHLIGHT Diablo Canyon Unit 2 Fuel loading was completed May 15. Currently the vessel head is being tensioned down. The Unit is expected to go critical on about July 7 and will be ready for power accession by July 17.

Unit 1 Since May 18 the Unit experienced three separate reactor trips, all of which apparently due to failures in the power supply system for instruments in the control room. The licensee is evaluating the root cause(s). The Unit is currently at 20 percent power.

Hans Schierling, Project Manager Licensing Branch No. 3 Division of Licensing Distribution:

Docket File LBf3 Reading JLee HSchierling AD/L Technical Assistant (E. Weinkam)

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MEMORANDUM FOR: H. Denton, NRR D. Eisenhut, NRR G. Edison,'TOSB, NRR H. Thompson, DL F. Miraglia, DL T. Novak, DL W. Russell, Acting Director, DHFS J. Knight, Acting Director, DE R. Bernero, DSI T. Speis, DST B. Snyder, TMIPO, G. Holahan, ORAB

- G. Lainas. DL D. Crutchfield, DL THRU: George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing FROM: Hans Schierling, Project Manager Licensing Branch No. 3 Division of Licensing

SUBJECT:

DAILY HIGHLIGHT Diablo Canyon Units 1 and 2 Diablo Canyon Unit I reached 100% power and was declared commercial at 2:43 l am PST, May 7, 1985. PG8E loaded the first element of fuel into Unit 2 at  ;

7:12 am PST, May 7, 1985. j DISTRIBUTION:

Hans Schierling, Project Manager Docket File 50-275/323 Licensing Branch No. 3 LBf3 Reading SBlack Division of Licensing JLee JLyons HSchierling i EWeinkam

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