ML20052F239
| ML20052F239 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Hatch, Peach Bottom, Browns Ferry, Arkansas Nuclear, Brunswick, Crystal River, Ginna, 05000363, 05000000 |
| Issue date: | 11/03/1981 |
| From: | Felton J NRC OFFICE OF ADMINISTRATION (ADM) |
| To: | Dignan T ROPES & GRAY |
| Shared Package | |
| ML19219B002 | List: |
| References | |
| FOIA-81-417 NUDOCS 8205120265 | |
| Download: ML20052F239 (4) | |
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November 3,1981
- /W Thomas G. Dignan, Jr., Esquire Ropes & Gray 225 Franklin Street IN RESPONSE REFER Boston, MA 02110 TO F01A-81-417
Dear Mr. Dignan:
This is in reply to your letter dated October 14, 1981, in which you requested, pursuant to the Freedom of Information Act, copies of documents which respond to the nine specific subjects defined in your letter.
In response to your request, copies of the documents subject to your request, listed on Appendix A hereto, are enclosed.
The charge for reproducting records not located in the NRC Public Document Room is five cents (50.05) per page, as specified in 10 CFR 9.14(a).
Accordingly, the cost of reproducing the enclosed 628 pages is $31.40.
The published charges for NUREG-0460 Volumes 1 thru 4 is $46.00.
The combined charges totals $77.40.
You will be billed for this amount by the Office of the Controller of the Nuclear Regulatory Commission.
It has come to our attention that some articles of possible interest to you, concerning Scram Discharge Volume Level Switches which failed or malfunctioned are contained in various issues of the copyrighted monthly publication known as Reactor Power Experience, Volume BWR-2; IV. Cont.
Rods & Drives; B. Drives; (various page numbers).
You may wish to communicate with the publisher to obtain access to this copyrighted material.
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M.' Felton, Director Division of Rules and Records Office of Administration
Enclosures:
As stated 8205120265 811103 PDR FOIA DICNAN81-417 PDR
Re:
FOIA-81-417 APPENDIX A 1A. April 1978, Vol. 1 NUREG-0460, Anticipated Transients Without Scram For Light Water Reactors, Staff Report (94 pages), $6.50
- 18. April 1978, Vol. 2 NUREG-0460, Appendices - Anticipated Transients Without Scram For Light Water Reactors, (Est.
375pages),$21.50 1C. December 1978, Vol. 3 NUREG-0460, Staff Report - Anticipated Transients Without Scram For Light Water Reactors, (Est.
115 pages), $9.00 1D. March 1980, Vol. 4 NUREG-0460 For Comment - Anticipated Transients Without Scram For Light Water Reactors, Resolution of Unresolved Safety Issue TAP A-9 (Est.115 pages),$9.00 2.
May 1981 NUREG-0785 Draft Report - Safety Concerns Associated With Pipe Breaks In The BWR Scram System (49 pages) 3.
May 28, 1980 Letter To: J. P. O'Reilly, From: A. C. Tollison, Jr.,
"Special Report On Scram Discharge Volume Float Switches".
(2 pages) 4.
June 28, 1980 Printout-Event Sequence Recorder Printout From BF-3 Partial Scram System Failure (2 pages) 5.
July 6, 1980 Report and Safety Evaluation of the Browns Ferry Unit 3 Partial Scram Failure of June 28, 1980 (3 pages) 6.
July 30,1980 Report On The Browns Ferry 3 Partial Failure To Scram Event on June 28, 1980 (55 pages) 7.
August 8, 1980 Preliminary Draft Report - A Review of Recent Malfunctions of BWR Scram Systems, An Interim Report To The ACRS by a Task Force of ACRS Staff and Fellows.
(58 pages) 8.
September 26, 1980 General Electric Company Information Newsletter:
Failure of Magnetrol Scram Discharge Volume (SDV)
Level Switches SIL No. 331, Supplement 3, Category 1 (2 pages) 9.
August 5, 1977 General Electric Company Information Newsletter:
Venting of CRD Hydraulic System Scram Discharge Level Switches During Test and Calibration, SIL No. 238, Category 1 (2 pages)
Re:
F0!A-81-417 APPENDIX A
- 10. January 15, 1981 A Review of Recent Malfunctions of BWR Scram Systems, A Report To The ACRS by A Task Force of ACRS Staff and Fellows.
(#ACRSSM 0185 -
Released to PDR August 1980 as Preliminary Draft) (126 pages)
- 11. January 28, 1981 Memorandum To: H. R. Denton, From: T. E. Murley,
Subject:
DST Review of NRC Staff Safety Evaluation Report on BWR Scram Discharge System.
(3 pages) 12.
February 20, 1981 Memorandum To:
H. R. Denton From: T. E. Murley,
Subject:
Update of DST Review of NRC Staff Safety Evaluation Report on BWR Scram Discharge System.
(6 pages) 13.
February 28, 1981 Memorandum To: P. S. Check, From: V. W. Panciera,
Subject:
IN0P/NSAC Report - Analysis of Incomplete Control Rod Insertion At Browns Ferry 3 (76 pages) 14.
Undated Print-out Licensee Event Reports (81 pages)
- 15. Undated Handvritten Summary (8 pages)
- 16. Undated Draf t Position On Diversity For SDV Level Instru-mentation.
(3 pages)
- 17. Undated Viewgraph Copy - Findings Through Bulletin 80-14 On SDIV Level Switch Problems (1 page) 18.
Undated Viewgraph Copies - Hatch and Brunswick Events (22 pages)
- 19. Undated Handwritten notes by V Panciera (6 pages) 20.
Undated Handwritten notes - Arguments Concerning Diversity of SDV Level Sensing Instruments, Pro and Con (2 pages)
- 21. Undated Report re: Browns Ferry Unit No. 3 fire (53 pages) 22.
Undated Memorandum To: E. I. Jcrdan, From: P. S. Check,
Subject:
Staff Positior, on Brunswick, Unit Partial Scram Event (11 pages) 23.
Undated Position Paper On Scram Discharge Volume (SDV)
Independence From Venting For Safety Function (4 pages) i
Re:
APPENDIX A
- 24. Undated Collection of miscellaneous documents on 8 1/2 x 14 inches paper (63 pages) i i
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Telecopied to John Hanna (NRC)
May 28, 1980 m.mmq Vu l3
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Brunswick Steam Electric Plant P. O. Box 10429 Southport, NC 28461 May 28, 1980 FILE:
3C9-13516 SERIAL: BSEP/80-920 Mr. James ?.
O'Reilly, Director 3
U. 5. Ncelcar Regulatory Coc=ission Region II, Suite 3100 101 Marietta Street N.W.
Atlanta CA 30303 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 & 2 LICENSE NOS. DPR-71 AND DPR-62 DOCKET NOS. 50-325 AND 50-324 SPECIAL REPORT ON SCRAM DISCHARGE VOLUME FLOAT SWITCHES
Dear Mr. O'Reilly:
I j'
As request.:d in a tonference call on May 22, 1980,.between Messrs. John Hannon (ONRR), Eill Mills (OIE), Paul Rellogg (Region II), and Messrs. Morris Brown, Sam 3ohanan, Jim McQueen (Carolina Power & Light Company), the Brunswick Steam.
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Electric Plant (BSEP) submits the following information on the Unit No. 1 scram discharge volume float switch failure on November 14, 1979.
During a reactor scram on October 19, 1979, the scram discharge volume drain valve did not close in the required time, causing a water hammer event which damaged several pipe supports on the scram discharge volume discharge piping (LER 2-D 74). The valve was positioning itself in the "close" position in five minutes vice the required less than 30 seconds due to a faulty solenoid cencrolling the air supply to the valve.
The damaged pipe supports were repaired.
Based on the nonavailability of parts to repair or replace the drain valve solenoid, it.was decided to start up on November 13, 1979,.with the vent and drain valves closed to prevent possible damage from a scram.
Operations per-sonnel were to monitor the scram discharge volume by period'ically draining, as necessary, when the " Scram Discharge Valume Not Drained" alarm annunciated at 39 gallons. A rod block is designed to actuate at 69 gallons and a reactor scram cecurs at 109 gallons. At 0616 on November 14, 1979,,.the' Unit No. 1 reactor scra:=ed from 4% power during a heatup on a high scram discharge volume level (109 gallons) without receiving the high level alarm or the rod block.
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Mr. James P. O'Reilly May 28, 1980 An inspection of the level switches, Magnetrol Model 50-751, revealed that the float ball on the rod block switch was crushed and the float ball stem on the high level switch was bent such that the switches would not work.
The damaged float ball and stem were replaced and the switches calibrated 'and tested satis-factorily. The remaining four switches and float assemblies on Unit No. 1 and
-all six, assemblies on Unit No. 2 were inspected with no problems found.
It is believed that the water ha==cr event from the October 19, 1979, scram caused the failure of the two switch assemblies.
A replacement scler.oid to repair the scram discharge volume drain valve was located at the Hatch Plant (Georgia Power & Light Company), flown to BSEP, and installed. The valve was tested satisfactorily and the scram discharge volume vent and drain system was returned to a normal lineup. A periodic test has been established to test the high level alarm and the rod block function of these switches.
Also, a Maintenance Instruction has been prepared to perform a periodic functional test of the scram discharge volume vent and drain valves'.
- de trust that this information satisfies the co,ncerns expressed on the failure of these switches.
If you have any additional questions on this matter, please contact a member of my staff or me.
j Very truly yours,
.ij da A. C. Tollison, Jr., General Manager Brunswick Steam Electric Plant RMP/ s gb,,
cc:
Mr. R. A. Hartifeld Mr. V.
Stello, Jr.
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