ML17298A037
| ML17298A037 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 06/25/1982 |
| From: | Felton J NRC OFFICE OF ADMINISTRATION (ADM) |
| To: | NRC OFFICE OF ADMINISTRATION (ADM) |
| Shared Package | |
| ML17298A038 | List: |
| References | |
| NUDOCS 8207060350 | |
| Download: ML17298A037 (10) | |
Text
Board Notificati on Dis tribution BN¹82-59 ASLB:
Callaway 1
Comanche Peak 1
& 2 Palo Verde 1, 2
& 3 Pebble Springs 1
& 2 Suraner 1
Waterford 3
STEAM GENERATOR TUBE RUPTURE DATE:
JUNE 2 8 lRQ ASLAB:
San Onofre 2
& 3 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 NSI C Branches LB¹1, ¹3
& ¹4 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 Resi dent Inspectors W. Dircks (3)
A. Bennett, OELD (3)
E. Christenbury, OELD J. Scinto, OELD Board Service List
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 JUNE 3 2 I982 MEMORANDUM FOR:
The Atomic Safety 5 Licensing Boards for:
Callaway Plant, Unit 1
Comanche Peak Steam Electric Station, Units 1
8 2
Palo Verde Nuclear Generating Station, Units 1, 2 5 3 Pebble Springs, Units 1
8 2
Virgil C.
Summer Nuclear Station, Unit 1
Waterford Steam Electric Station, Unit 3 FROM:
SUBJECT:
and The Atomic Safety
& Licensing Appeal Board for:
San Onofre Nuclear Generating Station, Units 2
8 3
Robert L. Tedesco, Assistant Director for Licensing Division of Licensing, ONRR BOARD NOTIFICATION - STEAN 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 qui cker reduction of the primary pressure to the set point pressure of the secondary relief valves.
Therefore, the staff has requi red reduced radioiodine limiting conditions for operation for the Ginna primary coolant activity.
These lower
Contact:
J.
D. Kerrigan, ONRR X29 788
The Atomic Safety 8 Licensing Board The Atomic Safety 8 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 acci.dents, 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
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DISTRIBUTION OF BOARD NOTIFICATION Callaway Unit I Docket No.
STN 50-483 Mr. Samuel J. Birk Mr. Dan I. Bolef Mr. Donald Bollinger Mr. Glen 0. Bright Mr. Earl Brown A. Scott Cauger, Esq.
Kenneth M. Chackes, Esq.
Gerald Charnoff, Esq.
Eric A. Eisen, Esq.
James P. Gleason, Esq.
Dr. Jerry R. Kline Rose Levering Mr. Harold Lottman Mr. Fred Luekey Professor William H. Miller Mr. John G.
Reed Ms. Marjorie Reilly Ms. Barbara Shull Mayor Howard Steffen Mr. Robert G. Wright Comanche Peak Units 1&2 Docket Nos. 50-445/446 Dr. Richard Cole Mrs. Juanita Ellis Dr. Kenneth A. McCollom Marshall E. Miller, Esq.
Lucinda Minton, Esq.
David J. Preister, Esq.
Nicholas S.
- Reynolds, Esq.
Palo Verde Units 1,2&3 Docket Nos.
50-528/529/530 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.
Pebble Springs Units 1&2 Docket Nos. 50-514/515 James W. Durham, Esq.
Mr. J.
Carl Freedman Mr. Donald W. Godard Ms. Bernice Ireland Dr. Walter H. Jordan Frank Josselson, Esq.
Mr. Lloyd K. Marbet Frank W. Ostrander, Jr..
Esq.
Dr. Oscar H. Paris Kathaleen H. Shea, Esq.
Mr. Ivan W. Smith Summer Unit 1
Docket No. 50-395 Mr. Brett Allen Bursey George Fischer, Esq.
Joseph B. Knotts, Esq.
Herbert Grossman, Esq.
Dr. Frank F. Hooper Mr. Gustave A. Linenberger Randolph R.
- Mahan, Esq.
Mr. John Ruoff Richard P. Wilson, Esq.
Waterford Unit 3 Docket No. 50-382 E. Blake, Esq.
Luke B. Fontana, Esq.
Dr. Harry Foreman Mr. Gary L. Groesch Dr. Walter H. Jordan Malcolm Stevenson, Esq.
Sheldon J. Wolfe, Esq.
Atomic Safety and Licensing Board Panel Atomic Safety and Licensing Appeal Panel Docketing and Service Section Document Management Branch ACRS MEMBERS Dr. Robert C. Axtmann Mr. Myer Bender Dr. Max W. Carbon Mr. Jesse C. Ebersole Mr. Harold Etherington Dr. William Kerr Dr. Harold W. Lewis Dr. J.
Carson Mark Mr. William M. Mathis Dr. Dade W. Moeller Dr. David Okrent Dr. Milton S. Plesset Mr. Jeremiah J.
Ray Dr. Paul G.
Shewmon Dr. Chester P. Siess Mr. David A. Ward
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DISTRIBUTION OF BOARD NOTIFICATION San Onofre 2&3/ALAB Docket Nos. 50-361/362 OL Mr. A. S. Carstens Mr. Gary D. Cotton Stephen F.
Ei lperin, Esq.
Phyllis M. Gallagher, Esq.
Dr. Reginald L. Gotchy Dr. Cadet H. Hand, Jr.
Mrs. Lyn Harris Hicks Mrs. Elizabeth B. Johnson Dr.
W.
Reed Johnson James L. Kelley, Esq.
Janice E. Kerr, Esq.
Charles R. Kocher, Esq.
Charles E. McClung, Jr.,
Esq.
David R. Pigott, Esq.
Alan R. Watts, Esq.
Richard J. Wharton, Esq.
Atomic Safety and Licensing Board Panel Atomic Safety and Licensing Appeal Panel Docketing and Service Section Document Management Branch ACRS Members Dr. Robert C. Axtmann Mr. Myer Bender Dr. Max W. Carbon Mr. Jesse C. Ebersole Mr. Harold Etherington Dr. William Kerr Dr. Harold W. Lewis Dr. J.
Carson Mark Mr. William M. Mathis Dr.
Dade W. Moeller Dr. David Okrent Dr. Milton S. Plesset Mr. Jeremiah J.
Ray Dr. Paul C.
Shewmon Dr. Chester P. Siess Mr. David A. Ward
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