ML13308A150
| ML13308A150 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde, Summer, Callaway, Waterford, San Onofre, Comanche Peak, 05000514, 05000000, 05000515 |
| Issue date: | 06/22/1982 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | NRC Atomic Safety & Licensing Appeal Panel (ASLAP), Atomic Safety and Licensing Board Panel |
| References | |
| TASK-AS, TASK-BN-82-59 BN--82-59, BN-82-59, NUDOCS 8207060353 | |
| Download: ML13308A150 (10) | |
Text
Board Notification Distribution DATE:
JUNE 2 2 BN#82-59 ASLB:
Callaway 1 ASLAB: San Onofre 2 & 3 Comanche Peak 1 & 2 Palo Verde 1, 2 & 3 Pebble Springs 1 & 2 Summer 1 Waterford 3 STEAM GENERATOR TUBE RUPTURE Distribution w/o enclosure Document Control (STN 50-483, 50-445/446, 50-528/529/530, 50-514/515 50-395, 50-382, 50-361/362)
NRC PDR L PDR PRC System NSIC Branches LB#1, #3 & #4 Reading J. Youngblood F. Miraglia E. Adensam J. Lee M. Rushbrook M. Duncan G. Edison S. Burwell E. Licitra D. Scaletti W. Kane S. Black B. Buckley/H. Schierling R. Tedesco/J. Kerrigan D. Eisenhut/R. Purple M. Williams H. Denton/E. Case R. Vollmer H. Thompson R. Mattson S. Hanauer Attorney, OELD I&E Regional Administrator (II, III, IV, V)
Resident Inspectors W. Dircks (3)
A. Bennett, OELD (3)
E. Christenbury, OELD J. Scinto, OELD Board Service List
,o(
,_pf REG,4 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 JUNE 2 2 1982 MEMORANDUM FOR:
The Atomic Safety & Licensing Boards for:
Callaway Plant, Unit 1 Comanche Peak Steam Electric Station, Units 1 & 2 Palo Verde Nuclear Generating Station, Units 1, 2 & 3 Pebble Springs, Units 1 & 2 Virgil C. Summer Nuclear Station, Unit 1 Waterford Steam Electric Station, Unit 3 and The Atomic Safety & Licensing Appeal Board for:
San Onofre Nuclear Generating Station, Units 2 & 3 FROM:
Robert L. Tedesco, Assistant Director for Licensing Division of Licensing, ONRR
SUBJECT:
BOARD NOTIFICATION - STEAM GENERATOR TUBE RUPTURE (Board Notification No. 82-59)
In accordance with present NRC procedures regarding Board Notifications, the enclosed information is being provided for your information as constituting new information relevant and material to safety issues.
This information is generic and may have applicability to all dockets with pressurized water reactors.
During the review of the recent Ginna steam generator tube rupture accident, it was determined that certain of the assumptions usually made in the staff's design basis accident calculations of off-site doses were non-conservative, at least for part of the accident.
Notwithstanding the potentially non conservative factors, the overall accident at Ginna resulted in off-site consequences that were extremely small fractions of the staff's calculated values. One reason for this was the low level of activity in the coolant at the time of the accident and the absence of an increase in radioiodine concentration resulting from the accident (that is there was no pre-existing iodine spike nor was one caused by the rupture event).
However, the emergency operating procedures followed by the operators resulted in over filling of the steam generators which caused large carry-over of contaminated water in the steam released to the environment.
Delays in equalizing the primary and secondary pressures resulted in larger steam-water emissions from the secondary side than would have been experienced with a quicker reduction of the primary pressure to the set point pressure of the secondary relief valves.
Therefore, the staff has required reduced radioiodine limiting conditions for operation for the Ginna primary coolant activity. These lower
Contact:
J. D. Kerrigan, ONRR X29788
The Atomic Safety & Licensing Board
- 2 The Atomic Safety & Licensing Appeal Board limits will remain in effect until the questions of overfilling a nd delays in equalizing pressure are resolved. Furthermore, the staff is reviewing the overfilling and pressure equalization questions relative to other plants and may consider reduced limits for them also.
Since the specific issues discussed above are not the only issues raised in the reviews of steam generator tube rupture accidents, the entire Ginna restart Safety Evaluation Report is attached for your information.
Until the staff, licensees, vendors and contractors have completed reviews of emergency operating procedures, plant designs, and coolant activity limits, no final staff position can be formulated.
However, it is the staff's judgment that this does not represent a compelling safety issue.
This judgment is based not only on the experience of the Ginna tube rupture accident and the three others in U.S. plants, but also on the apparent implausibility of having all factors at their worst case levels at the same time. These factors include those determined by unrelated conditions in the plant (such as pre-existing high radioiodine levels in the primary system), plant design, and emergency operating procedures.
We are continuing to pursue this issue and will keep you informed.
Robert L. Tedesco, Assistant Director for Licensing Division of Licensing, ONRR
Enclosure:
R. E. Ginna Safety Evaluation Report (NUREG-0916) cc:
Board Service List
DISTRIBUTION OF BOARD NOTIFICATION Callaway Unit 1 Pebble Springs Units 1&2 Docket No. STN 50-483 Docket Nos. 50-514/515 Mr. Samuel J. Birk James W. Durham, Esq.
Mr. Dan I. Bolef Mr. J. Carl Freedman Mr. Donald Bollinger Mr. Donald W. Godard Atomic Safety and Licensing Mr. Glen 0. Bright Ms. Bernice Ireland Board Panel Mr. Earl Brown Dr. Walter H. Jordan Atomic Safety and Licensing A. Scott Cauger, Esq.
Frank Josselson, Esq.
Appeal Panel Kenneth M. Chackes, Esq.
Mr. Lloyd K. Marbet Docketing and Service Section Gerald Charnoff, Esq.
Frank W. Ostrander, Jr.. Esq.
Document Management Branch Eric A. Eisen, Esq.
Dr. Oscar H. Paris James P. Gleason, Esq.
Kathaleen H. Shea, Esq.
Dr. Jerry R. Kline Mr. Ivan W. Smith Rose Levering Mr. Harold Lottman Mr. Fred Luekey Summer Unit 1 Professor William H. Miller Docket No. 50-395 ACRS MEMBERS Mr. John G. Reed Ms. Marjorie Reilly Mr. Brett Allen Bursey Dr. Robert C. Axtmann Ms. Barbara Shull George Fischer, Esq.
Mr. Myer Bender Mayor Howard Steffen Joseph B. Knotts, Esq.
Dr. Max W. Carbon Mr. Robert G. Wright Herbert Grossman, Esq.
Mr. Jesse C. Ebersole Dr. Frank F. Hooper Mr.
Harold Etherington Mr. Gustave A. Linenberger Dr. William Kerr Comanche Peak Units 1&2 Randolph R. Mahan, Esq.
Dr. Harold W. Lewis Docket Nos. 50-445/446 Mr. John Ruoff Dr. J. Carson Mark Richard P. Wilson, Esq.
Mr. William M. Mathis Dr. Richard Cole Dr. Dade W. Moeller Mrs. Juanita Ellis Dr. David Okrent Dr. Kenneth A. McCollom Waterford Unit 3 Dr. Milton S. Plesset Marshall E. Miller, Esq.
Docket No. 50-382 Mr. Jeremiah J. Ray Lucinda Minton, Esq.
Dr. Paul G. Shewmon David J. Preister, Esq.
E. Blake, Esq.
Dr. Chester P. Siess Nicholas S. Reynolds, Esq.
Luke B. Fontana, Esq.
Mr. David A. Ward Dr. Harry Foreman Mr.
Gary L. Groesch Palo Verde Units 1,2&3 Dr. Walter H. Jordan Docket Nos. 50-528/529/530 Malcolm Stevenson, Esq.
Sheldon 3. Wolfe, Esq.
Lynne Bernabei, Esq.
Dr. Dixon Callihan Dr. Richard F. Cole Arthur C. Gehr, Esq.
Mr. Rand L. Greenfield Ms. Lee Hourihan Robert M. Lazo, Esq.
DISTRIBUTION OF BOARD NOTIFICATION San Onofre 2&3/ALAB Docket Nos. 50-361/362 OL Mr. A. S. Carstens Dr. Robert C. Axtmann Mr. Gary D. Cotton Mr. Myer Bender Stephen F. Eilperin, Esq.
Dr. Max W. Carbon Phyllis M. Gallagher, Esq.
Dr. Reginald L. Gotchy Mr. Harold Etherington Dr. Cadet H. Hand, Jr.
Dr. William Kerr Mrs. Lyn Harris Hicks Dr. Harold W. Lewis Mrs. Elizabeth B. Johnson Dr. J. Carson Mark Dr. W. Reed Johnson Mr. William M. Mathis James L. Kelley, Esq.
Dr. Dade W. Moeller Janice E. Kerr, Esq.
Dr. David Okrent Charles R. Kocher, Esq.
Dr. Milton S. Plesset Charles E. McClung, Jr., Esq.
Mr. Jeremiah J. Ray David R. Pigott, Esq.
Dr. Paul C. Shewmon Alan R. Watts, Esq.
Dr. Chester P. Siess Richard J. Wharton, Esq.
Mr. David A. Ward Atomic Safety and Licensing Board Panel Atomic Safety and Licensing Appeal Panel Docketing and Service Section Document Management Branch
JUNE 2 2 1982 MEMORANDUM FOR: The Atomic Safety & Licensing Boards for:
Callaway Plant, Unit 1 Comanche Peak Steam Electric Station, Units 1 & 2 Palo Verde Nuclear Generating Station, Units 1, 2 & 3 Pebble Springs, Units 1 & 2 Virgil C. Summer Nuclear Station, Unit 1 Waterford-Steam Electric Station, Unit 3 and The Atomic Safety & Licensing Appeal Board for:
San Onofre Nuclear Generating Station, Units 2 & 3 FROM:
Robert L. Tedesco, Assistant Director for Licensing Division of Licensing, ONRR
SUBJECT:
BOARD NOTIFICATION - STEAM GENERATOR TUBE RUPTURE (Board Notification No. 82-59)
In accordance with present NRC procedures regarding Board Notifications, the enclosed information is being provided for your information as constituting new information relevant and material to safety issues.
This information is generic and may have applicability to all dockets with pressurized water reactors.
During the review of the recent Ginna steam generator 'tube rupture accident, it was determined that certain of the assumptions usually made in the staff's design basis 'accident calculations of off-site doses were non-conservative, at least for part of the accident.
Notwithstanding the potentially non conservative factors, the overall accident at Ginna resulted in off-site consequences that were extremely small fractions of the staff's calculated values.
One reason for this was the low level of activity in the coolant at the time of the accident and the absence of an increase in radioiodine concentration resulting from the accident (that is there was no pre-existing iodine spike nor was one caused by the rupture event). However, the emergency operating procedures followed by the operators resulted in over filling of the steam generators which caused large carry-over of contaminated water in the steam released to the environment. Delays in equalizing the primary and secondary pressures resulted in larger steam-water emissions from the secondary side than would have been experienced with a quicker reduction of the primary pressure to the set point pressure of the secondary relief valves.
Therefore, the staff has required reduced radioiodine limiting conditions for operation for the Ginna primary coolant activity. These lower 8207060353 620622 PDR ADOCK 05000361 OFFICEO PDR SURNAME.
DATE NRC.
FORM 31
.10/80.
NRCM O240 U
9................
NRC FORM 318 00/80) NRCM 0240 OFFICIAL RECORD COPY
~USGPO 198-329-824
The Atomic Safety & Licensing Board JUNE 2 2 1982 The Atomic Safety & Licensing Appeal Board limits will remain in effect until the questions of overfilling a nd delays in equalizing pressure are resolved. Furhtermore, the staff is reviewing the overfilling and pressure equalization questions relative to other plants and may consider reduced limits for them also.
Since the specific issues discussed above are not the only issues raised in the reviews of steam generator tube rupture accidents, the entire Ginna restart Safety Evaluation Report is attached for your information.
Until the staff, licensees, vendors and contractors have completed reviews of emergency operating procedures, plant designs, and coolant activity limits, no final staff position can be formulated. However, it is the staff's judgment that this does not represent a compelling safety issue.
This judgment is based not only on the experience of the Ginna tube rupture accident and the three others in U.S. plants, but also on the apparent implausibility of having all factors at their worst case levels at the same time. These factors include those determined by unrelated conditions in the plant (such as pre-existing high radiolodine levels in the primary system), plant design, and emergency operating procedures.
We are continuing to pursue this issue and will keep you informed.
Original signed by Robert L Tedesco Robert L. Tedesco, Assistant Director for Licensing Division of Licensing, ONRR
Enclosure:
R. E. Ginna Safety Evaluation Report (NUREG-0916) cc:
Board Service List DISTRIBUTION See attached Listing OFFICEO 0.
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.... I - 8 SURNAME0.
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.2 NRC FORM 318(10o80) NRCM 0240 OFFICIA.
RUSGPO:1980-329-824
Board Notification Distribution DATE:
JUNE 2 2 BN#82-59 ASLB:
Callaway 1 ASLAB:
San Onofre 2 & 3 Comanche Peak 1 & 2 Palo Verde 1, 2 & 3 Pebble Springs 1 & 2 Summer 1 Waterford 3 STEAM GENERATOR TUBE RUPTURE Distribution w/o enclosure.
Document Control (STN 50-483, 50-445/446, 50-528/529/530, 50-514/515 50-395, 50-382, 50-361/362)
NRC PDR L PDR PRC System NSIC Branches LB#l, #3 & #4 Reading J. Youngblood F. Miraglia E. Adensam J. Lee M. Rushbrook M. Duncan G. Edison S. Burwell E. Licitra D. Scaletti W. Kane S. Black B. Buckley/H. Schierling R. Tedesco/J. Kerrigan D. Eisenhut/R. Purple M. Williams H. Denton/E.
Case R. Vollmer H. Thompson R. Mattson S. Hanauer Attorney, OELD I&E Regional Administrator (II, III, IV, V)
Resident Inspectors W. Dircks (3)
A. Bennett, OELD (3)
E. Christenbury, OELD J. Scinto, OELD Board Service List
DISTRIBUTION OF BOARD NOTIFICATION Callaway Unit 1 Pebble Springs Units 1&2 Docket No. STN 50-483 Docket Nos. 50-514/515 Mr. Samuel J. Birk James W. Durham, Esq.
Mr. Dan I. Bolef Mr.. Carl Freedman Atomic Safety and Licensing Mr. Donald Bollinger Mr. Donald W. Godard Board Panel Mr. Glen 0. Bright Ms. Bernice Ireland Mr. Earl Brown Dr. Walter H. Jordan A. Scott Cauger, Esq.
Frank Josselson, Esq.
Appeal Panel Kenneth M. Chackes, Esq.
Mr. Lloyd K. Marbet Docketing and Service Section Gerald Charnoff, Esq.
Frank W. Ostrander, Jr.. Esq.
Document Management Branch Eric A. Eisen, Esq.
Dr. Oscar H. Paris James P. Gleason, Esq.
Kathaleen H. Shea, Esq.
Dr. Jerry R. Kline Mr. Ivan W. Smith Rose Levering Mr. Harold Lottman Mr. Fred Luekey Summer Unit 1 Professor William H. Miller Docket No. 50-395 ACRS MEMBERS Mr. John G. Reed Ms. Marjorie Reilly Mr. Brett Allen Bursey Dr. Robert C. Axtmann Ms. Barbara Shull George Fischer, Esq.
Mr. Myer Bender Mayor Howard Steffen Joseph B. Knotts, Esq.
Dr. Max W. Carbon Mr. Robert G. Wright Herbert Grossman, Esq.
Mr. Jesse C. Ebersole Dr. Frank F. Hooper Mr. Harold Etherington Mr. Gustave A. Linenberger 6r. William Kerr Comanche Peak Units 1&2 Randolph R. Mahan, Esq.
Dr. Harold W. Lewis Docket Nos. 50-445/446 Mr. John Ruoff Dr. J. Carson Mark Richard P. Wilson, Esq.
Mr. William M. Mathis Dr. Richard Cole Dr. Dade W. Moeller Mrs. Juanita Ellis Dr. David Okrent Dr. Kenneth A. McCollom Waterford Unit 3 Dr. Milton S. Plesset Marshall E. Miller, Esq.
Docket No. 50-382 Mr. Jeremiah J. Ray Lucinda Minton, Esq.
Dr. Paul G. Shewmon David J. Preister, Esq.
E. Blake, Esq.
Dr. Chester P. Siess Nicholas S. Reynolds, Esq.
Luke B. Fontana, Esq.
Mr. David A. Ward Dr. Harry Foreman Mr. Gary L. Groesch Palo Verde Units 1,2&3 Dr. Walter H. Jordan Docket Nos. 50-528/529/530 Malcolm Stevenson, Esq.
Sheldon 3. Wolfe, Esq.
Lynne Bernabei, Esq.
Dr. Dixon Callihan Dr. Richard F. Cole Arthur C. Gehr, Esq.
Mr. Rand L. Greenfield Ms. Lee Hourihan Robert M. Lazo, Esq.
DISTRIBUTION OF BOARD NOTIFICATION San Onofre 2&3/ALAB Docket Nos. 50-361/362 OL ACRS Members Mr. A. S. Carstens Dr. Robert C. Axtmann Mr. Gary D. Cotton Mr. Myer Bender Stephen F. Eilperin, Esq.
Dr. Max W. Carbon Phyllis M. Gallagher, Esq.
Mr. Jesse C. Ebersole Dr. Reginald L. Gotchy Mr. Harold Etherington Dr. Cadet H. Hand, Jr.
Dr. William Kerr Mrs. Lyn Harris Hicks Dr. Harold W. Lewis Mrs. Elizabeth B. Johnson Dr. J. Carson Mark Dr. W. Reed Johnson Mr. William M. Mathis James L. Kelley, Esq.
Dr. Dade W. Moeller Janice E. Kerr, Esq.
Dr. David Okrent Charles R. Kocher, Esq.
Dr. Milton S. Plesset Charles E. McClung, Jr., Esq.
Mr. Jeremiah J. Ray David R. Pigott, Esq.
Dr. Paul C. Shewmon Alan R. Watts, Esq.
Dr. Chester P. Siess Richard J. Wharton, Esq.
Mr. David A. Ward Atomic Safety and Licensing Board Panel Atomic Safety and Licensing Appeal Panel Docketing and Service Section Document Management Branch