Letter to All Operating Boiling~Water Reactor Licensees with Mark I and Mark II Containments dated

REQUEST FOR VOLUNTARY RESPONSE TO PETITION FROM UNION OF CONCERNED SCIENTISTS REGARDING COMPLIANCE WITH TITLE 10 OF THE CODE OF FEDERAL REGULA TIONS (10 CFR), PART 50, APPENDIX A, GENERAL DESIGN CRITERIA 44, "COOLING WATER," AND 10 CFR 50.49, "ENVIRONMENTAL QUALIFICATION"